Malicious PDF — malware analysis report

Static analysis result for SHA-256 52328a06f44ccfae…

MALICIOUS

PDF

83.0 KB Created: 2021-04-24 20:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 669564daf000689bedf82719d4ba7564 SHA-1: 9c828b3bf252a8b86788ceae2c6fa2b084c70665 SHA-256: 52328a06f44ccfae10690f16d884baa7397b2fa2ec3986a40f17c6b7c64898ea
156 Risk Score

Malware Insights

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

The PDF document contains a lure related to an HP printer error, which is a common tactic for phishing or malware distribution. It includes numerous external links, with one prominent link pointing to 'seumenha.ru', suggesting a redirection to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=hp+7525+printhead+missing+error
    • https://jezonekapinojel.weebly.com/uploads/1/3/4/6/134619201/4193311.pdf
    • https://cdn.sqhk.co/jarogofef/jciijfD/42097307831.pdf
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/buliwebu-lojipezuwopek-falogovutiper.pdf
    • https://fibunijir.weebly.com/uploads/1/3/0/7/130740490/verimisiw-nizerisukeri.pdf
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/segaremu.pdf
    • http://medebupima.sportsontheweb.net/actionable_gamification_beyond_points_badges_and_leaderboards.pdf
    • http://rulajamizap.getenjoyment.net/sarosugoxudosulaf.pdf
    • https://wazafalesozem.weebly.com/uploads/1/3/4/4/134498636/46848b27b118b.pdf
    • https://cdn.sqhk.co/bumogebiz/kRribFg/frog_craft_ideas_for_preschoolers.pdf
    • http://bumufirila.mygamesonline.org/68795851669.pdf
    • https://cdn.sqhk.co/sipobufiw/ihf2hf2/superhero_bmx_racing_simulator_game.pdf
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/disarokijuxev-kewerimopeza.pdf
    • https://cdn.sqhk.co/fobonelaga/9Yiigha/78043749490.pdf
    • https://cdn.sqhk.co/nezerozara/bjgWXjh/jovetepuvekenovodopi.pdf
    • https://lubavezutumeji.weebly.com/uploads/1/3/4/7/134757539/xubudobuvi.pdf
    • https://jetasiduneka.weebly.com/uploads/1/3/4/5/134586997/4019997.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tokit/acoustasonic_telecaster_manual.pdf
    • https://bc80c028-b71a-4936-8b52-739d97125464.filesusr.com/ugd/fb4f66_3ca83a9702214d4bbf4fc2f4acfe223c.pdf?index=true
    • https://s3.amazonaws.com/guxosa/16603780242.pdf
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_29de056494bb41e6978b11390fd484d6.pdf?index=true
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_a05ba94e08614ac782138f7779c77e6a.pdf?index=true
    • https://s3.amazonaws.com/juvuraguvutoxif/bujifuwumajibofuvomomaso.pdf
    • https://s3.amazonaws.com/bipovoromoj/wiwovu.pdf
    • https://s3.amazonaws.com/fosalizuzu/68368937612.pdf
    • 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_off0000f70d.bin
346650c69fbc22f9053e574a4434c34e142a8a5e1d21e6b37b2439f8e6e2a503
pdf-font-stream PDF embedded font (sfnt) at offset 0xF70D 5424 bytes
font_01_sfnt_off0001094c.bin
f43dae61b05a2cfabd8a973b13235e847f7439775209949e982a019c60efd398
pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 11452 bytes
font_02_sfnt_off00013054.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x13054 4324 bytes