Malicious PDF — malware analysis report

Static analysis result for SHA-256 785920c94b719e67…

MALICIOUS

PDF

91.8 KB Created: 2021-04-01 18:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c557e63d07c31c73ae42702fec3795b SHA-1: d866a773b24f0cb30f6f97e9cce2dedbaf2d9a3c SHA-256: 785920c94b719e672b2ad8c35747149f03d6ace570583d822758f652dc1363e8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing. No scripts were extracted, but the presence of numerous URLs points to an attempt to redirect the user to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=2006+gmc+envoy+problems
    • https://cdn.sqhk.co/befozaxulot/ehcwhmt/bleach_tie_dye_patterns_sweatpants.pdf
    • https://cdn.sqhk.co/ruxuzobisu/3ojejR0/31742432137.pdf
    • https://cdn.sqhk.co/tajaketo/Qj3ghEq/app_screen_recorder_terbaik.pdf
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/pakeveg_pazozekibufalik_digedavoga.pdf
    • https://cdn.sqhk.co/webuzifinuno/0gjsQMD/arknights_warfarin_good.pdf
    • https://cdn.sqhk.co/keridola/ij8woea/wevifukatav.pdf
    • https://cdn.sqhk.co/vixemujomu/2gghihh/43461624114.pdf
    • https://mizeximo.weebly.com/uploads/1/3/4/2/134265944/9f9f4c4ea979.pdf
    • https://cdn.sqhk.co/vefapatape/fjhjjBP/bubererojapazuduloludaki.pdf
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/tavixikiponem.pdf
    • https://cdn.sqhk.co/tizesefetus/mghUNge/xozupafaz.pdf
    • http://xoxanuf.mygamesonline.org/37586441180.pdf
    • https://cdn.sqhk.co/fuvopone/REgefhe/rankin_bass_jack_frost.pdf
    • http://damewumesigalut.medianewsonline.com/how_to_rewrite_logs_in_terms_of_others.pdf
    • http://lazirawolewok.getenjoyment.net/wepom.pdf
    • https://zasefijokadi.weebly.com/uploads/1/3/4/6/134667753/4361335.pdf
    • https://cdn.sqhk.co/lilodipu/JgijeJZ/wolf_girl_and_black_prince_full_episodes.pdf
    • https://cdn.sqhk.co/sunalikefazo/ihjidks/divorovebulefi.pdf
    • https://cdn.sqhk.co/xezojutatow/ioN3jbI/xenapop.pdf
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/654560f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_ca317ae3e5544633ae113244a776edfe.pdf?index=true
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_64ecf33b96dd47e69bbe4d15fdf1e0e3.pdf?index=true
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_0310b055f7bb492ca73556738083fbba.pdf?index=true
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_06ba8e3b1acf49e6bffc22fc3802804c.pdf?index=true
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_23ca85b800414a0c9202911caa905a2b.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117a4.bin
e9f9ca7bcd4f3a6d9f6d08cc992b199c169188ba4fc0583c86be97a7927e6e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 5340 bytes
font_01_sfnt_off000129a2.bin
84fc5e9da4e982eb8ad7f77a3df5ae23aa5680c5490e84e3ad890b7ce1163984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A2 12516 bytes
font_02_sfnt_off00015208.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15208 4324 bytes

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