Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b82eac2632a758…

MALICIOUS

PDF

79.7 KB Created: 2021-06-14 20:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e66f5687d781fd8d99d3344398ff0d4b SHA-1: bf255349e3c969126d8eceb4bdb130e6eda5a560 SHA-256: 65b82eac2632a758306547a4ca923fee64f68a3efa5b1e5d0eb8d141af54783a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5920

Heuristics 5

  • 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
  • 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://irlanc.ru/uplcv?utm_term=fortnite+android+apk+unsupported+device PDF link annotation
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096288a50d0e---25729079359.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9c9d481db---zobesajeg.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/22667898373.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83d81e1ac---naxosaku.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083402879156---tinox.pdfIn PDF document text
    • https://angkalaris.com/contents//files/8891718889.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/c3nkjshbqajbaameb14oplff9c/47567025534.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf0edb8c7---zinuxikuz.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/dba2t2qq78cup3qse1vhhdfu15/20014090703.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3gcodicp3osb61s9refbfkpnj6/43496555198.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0231d11cc1---50712354463.pdfIn PDF document text
    • https://paperland.bg/uploads/file/15513187641.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cbe4efaa9---movupalivufabenevibaxif.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/70744702922.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/92891508071.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/30vllv1edopuu4he5qqfhuroi0/29734242777.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/wesifa.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b786cc8f5c15c245e31e5842f5946b09/14537034220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 9148 bytes
SHA-256: 856171d1e4913184267da0606cd242fb504e876f17cec5f86e0dc3fe136fb2e8
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 4996 bytes
SHA-256: 4e68e4394b3315ef581ea8b9d401c31c4c23e666a132546bd9f8444b4435f376
font_02_sfnt_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 13612 bytes
SHA-256: 7b676ffde6e7a558c329b954c5e5150df66e38d44b855d6f4b9b03e818520c9e

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