Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c22955f191bd85e…

MALICIOUS

PDF

80.2 KB Created: 2021-06-09 19:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fc12ea5aef0571d274c1d575dd6782d5 SHA-1: c3a3a27d0166ed4196599b3efac322b55e5cec99 SHA-256: 9c22955f191bd85e17fbaaa2dc2cb0d70a2852fa109b7e845b8ddbda127d660c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristic firings point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=parallel+point+slope+form PDF link annotation
    • http://etcad.net/np/upfile/file/wigokowidegu.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/88d1647c03526d1afaebd9350ee701dd/zikuderejijep.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/verib.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/nawuzorinab.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ineh0kb9pu7q0h80c5bs5vp7p6/loxofaxomojone.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/ladexilojowelunurip.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/i3k8japsnmun6rvjrue2adktse/4452007418.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file/%5C/2021051607505860.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/11410424846.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d22e8f1f97---86041027698.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/cqp2eeimsmlj5guv7hrq8930pf/55882369501.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c19b25fd657ada1fdc730680807d3762/7371995079.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/fgadvkjhjei6l748mf77vo4dko/58348499130.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/17d8b6265560791ad88b29b62cb91d05/46090008647.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a9a091004---17367703878.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75833c62f---befolebamuwifapodovezota.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fc909845c---lenegeragemenizukamasosu.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/rjfuopq60qjfvdjaqbibrc0km2/dejefuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 4836 bytes
SHA-256: 1251ae5d662ad29fb1803f841af564f788e4c8a607ef06db86e9d6bcc4273a37
font_01_sfnt_off0000fead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 11460 bytes
SHA-256: c2a82c137c123ca4651588c8fda5ce63013a603ae24665f23ec4d60d155a361f
font_02_sfnt_off00012586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12586 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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