Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df1cbfeec31c342…

MALICIOUS

PDF

91.9 KB Created: 2021-07-01 10:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0d5eb6d00de56f79f9d85f96ae9620b9 SHA-1: d1b00373088128215ba638558fd7463a08166bb5 SHA-256: 0df1cbfeec31c342eb61f93e82ee0390f0820fd3cfbc101d0b5928d9aaaf65c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content or redirect users to phishing pages. No scripts were extracted, but the PDF structure and URL patterns indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pui-vital.ro/msg_media/file/tazitigu.pdf In PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aca8a73b741---47102223048.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/14783342674.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f17b1b53b789d0f8383cd750082c3f9c/pebemesifomosuve.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/95191592859.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/20171180946.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607416fe2c37c---bazexapezirof.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c47e8cbd109---62264152914.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/17591353129.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05592a467a---83770222885.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/wowamoxunuwanefam.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b138820235a---dulimajizoginilodetipeke.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607506959d56d---60279171004.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7a0be0b3---34551290160.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095669228cd0---6054277312.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vtn46n8m5hcbcqkglfucoagoh6/pegokagoniredapuru.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/16422231551.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160867601b793a---pekime.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e6ea609c5---janomel.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076440a051a0---5355199977.pdfIn PDF document text
    • https://capecoralliving.com/media/file/26256587632.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/50861521287.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+get+other+characters+in+mario+partyPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 10968 bytes
SHA-256: 204bc943ec9e41d910bdb55ede0e17bd57520e82b4679432da99a76098ea3f10
font_01_sfnt_off00011c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C07 17584 bytes
SHA-256: f3fceec20b0ab831d11da5601aefa02497cd1623a844fc6b36e7604713b3446e
font_02_sfnt_off00014a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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