Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f6efea4cf51a2e…

MALICIOUS

PDF

123.9 KB Created: 2021-06-30 08:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 384535de525f10b14ac79a7fd25b2ae2 SHA-1: 27a4256c4499845eef4b659967a1911d43f0f668 SHA-256: c6f6efea4cf51a2e63fa75a75c89416cdd0958928d2876838cc47d7d2e20bb3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the presence of numerous URLs pointing to potentially compromised infrastructure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/d0kupejcad956har5iumf7hnm0/manud.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9351a64e891f49f261516c0662c1ac81/ribanurunimoxate.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/614a718fa4dc5626670bdd224d5adc46/71641340073.pdf
    • http://ruresept.ru/files/file/23062155447.pdf
    • http://hilltop1976.com/clients/24685/File/3123533340.pdf
    • http://yjccnc.com/upload/files/zorizubijotaj.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607330833c199---51601583993.pdf
    • http://sovaimm.it/userfiles/files/90200290807.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/lvdcd9c3bge0gkagtarc697r6k/65959994604.pdf
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/84496258734.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c66056f712---lovovorazadobimavegapak.pdf
    • http://bannermaul.com/userData/board/file/57555435143.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/7a6123c432a69bf22d67008d31f16b7b/bifififewes.pdf
    • https://al-wesam.com/userfiles/files/94417682314.pdf
    • https://bbgpiti.com/userfiles/files/xidarutimunomazoxalep.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839b233aa56---88744211666.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/0ac05385d2d994b08dbb2e9c72b555b1/218530574.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8ad85f157---kupejerijagevujuvesoro.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f292a58d37---40924075226.pdf
    • http://praguetransfer.com/files/file/bepirujo.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/f2e63a4febe8e205329008905e218ea1/84454721851.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/22df538e6b942cc7105088938f52f8e0/38961547057.pdf
    • https://rybczewice.pl/userfiles/file/29847013931.pdf
    • http://artospace.com/pics/file/85975468489.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=though+at+the+end+of+the+sentence
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016bb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16BB9 16792 bytes
font_01_sfnt_off000183d0.bin
646938f50a12b7c02703bb1161bfab099499fd9d0feea16733bc96032f3af37d
pdf-font-stream PDF embedded font (sfnt) at offset 0x183D0 10580 bytes
font_02_sfnt_off00019bbb.bin
d0e02ea597b059e12c640018e4c0b859d2fbe31b167f59dc9fd0dc6423c65742
pdf-font-stream PDF embedded font (sfnt) at offset 0x19BBB 16488 bytes
font_03_sfnt_off0001b2a3.bin
c7160242cefa11c53430bb0be2fc9100f79616829ad2b195d4c0fc4491109ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2A3 17432 bytes