Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2e9b77b71f6cbc…

MALICIOUS

PDF

92.1 KB Created: 2021-07-07 22:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 27356144f4da976cb101d4a447540efb SHA-1: ecb8c7e50d53e78cdaa0d1b9e7dc971e5451577b SHA-256: 9c2e9b77b71f6cbc0d31f8813026911812fe202c96d9ab51a2ddd3e9c9846480
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host or distribute further malicious content. The presence of external URIs and a link farm suggests an attempt to redirect users to malicious sites for downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=spoken+poetry+about+love PDF link annotation
    • http://kssi.ir/public/userfiles/file/93625162592.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4320d056cdbec4d1688c8eef0ee26b4a/13844761283.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160892df812c06---debezanuxinakedijusuko.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b3feaea15---xipubawutexe.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/munivoguwidisebelagutusi.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/32915783470.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/0a14698781e86f41e2832ac8dc3abfcf/97973838209.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/18853630322.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/61656310b87f49100e52549f0918c7cd/zujazikekez.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/24360017812.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/56458657263.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/36278127257.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/bovarevijuxezafosikavet.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/77250695371.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fc6756928---22593544875.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/nilezumex.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16094dce15cd60---dakudagitexeziro.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/fosujunatatawoli.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080145aabb77---dawuvuzosot.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/mewuvozuxelebuta.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/06d546e97e711d2a22f08a98f794245a/4225768936.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 10572 bytes
SHA-256: ec48a1a16d29837db9459e243ce3d130d68c1a2dd0f3ea63bfbee053c7e72553
font_02_sfnt_off000132a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A7 19336 bytes
SHA-256: 268e11b1a552e75547d2b214e28610d1bb002ba57c20361a324376fbc823c9b3

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