Malicious PDF — malware analysis report

Static analysis result for SHA-256 343476730f1d1eec…

MALICIOUS

PDF

108.8 KB Created: 2021-06-27 05:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 251f0252f4b033ba8efb3e49a6104391 SHA-1: e162b3ab3a08d21d73a6265c7e3962b5fdf842c3 SHA-256: 343476730f1d1eec5eb9211ca1c8e9e5f516c91c78a1185e3204d596689622e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan PDF. It contains numerous links to compromised WordPress sites, suggesting it is used to distribute malicious content or phish for credentials. The presence of external URIs and link farms points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=intrinsic+meaning+in+english PDF link annotation
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c734b3c3847---78202626863.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/af579f5c959cd56626908de8670d579b/44491446311.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/503g01mh6uk7j08igotm5a2vt0/57617851135.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/48b74570d24833505fd72a921fc93e05/67132309712.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/eq9go88mj8aq1bs9avegsroco6/49901336480.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732ad849bd6---25094017608.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b39645daf2---kiwod.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/627hp833puc11hig6iht068jk0/xopixevekeferusunuloru.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/203550dbc44bb07449a6fac48ba261d2/munadusexono.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8f40339d0---fixawojulebe.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e2064120e0ccba85292689ee3b2cb1c/59553498893.pdfIn PDF document text
    • http://metapolar.hu/tmp/67005084844.pdfIn PDF document text
    • http://ibb-online.ru/f/file/nurewexegamubibe.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f11da081f---39719369573.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e7b050579---powezi.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/tutusoguvisezo.pdfIn PDF document text
    • https://unosms.us/userfiles/file/95793502528.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf96725571---kivalukibololawuz.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/4cu6fh6lmrcntkqnh4rqdd29d4/kadedotojezopugadebudefa.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5d7038f2d87a57ae52682348d7c1fe68/39908554686.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/pasosezorokapilidepaxe.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a682d9e6f---lilaginev.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9b50afbb8---fuderun.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9a15272c---34086458843.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013b1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13B1B 20216 bytes
SHA-256: db2391c6f244c39834ff53c2dd7d547b18ee72347cec705abe284daccacca809
font_00_sfnt_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 4740 bytes
SHA-256: 77cbb9e8ce7ede093e32f96d59eba685d5a016f74afe0874621b6a8364764caf
font_02_sfnt_off0001236d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236D 10508 bytes
SHA-256: fdbe1f9f2ea0f6881aa8c4c1464711a59040dc0440f34c9c90eb07c5ccea7126
font_04_sfnt_off00015e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E58 28620 bytes
SHA-256: 53e649a0e16452c09e7c7f6aa03cdf4d6b6868b35aa8aa50a4fc3227f802f48c

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