Malicious PDF — malware analysis report

Static analysis result for SHA-256 73102d2325a0b6b1…

MALICIOUS

PDF

66.4 KB Created: 2021-04-24 14:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 33ae4a99e1265b6dba9062ff437526f9 SHA-1: 5eb3dc3583121a620ce45bb97976a3a07a26705f SHA-256: 73102d2325a0b6b1c27c24c6f377ef784e39c620a90e88b6b70f9c3638a34f84
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically targeting printer issues. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://pelibifir.ru/strik?utm_term=why+is+my+canon+printer+not+turning+on PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5fe089be9c236.pdfIn PDF document text
    • http://xusolupofedowi.iblogger.org/renaissance_architecture_ppt_free.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/oKBiigd/sifexozafonozaduwodogup.pdfIn PDF document text
    • http://gutoguzo.iblogger.org/how_to_install_honeywell_thermostat_rth230b.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/jbjdjfq/splash_canyons_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/jgcjdXz/tropico_6_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_603c7b6fdccb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413119/normal_6018c0871e04e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_604849eb151c1.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/rqDhggc/cross_stitch_letter_pattern_cursive.pdfIn PDF document text
    • http://nulonelam.66ghz.com/odia_bhajan_instrumental_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/cement_manufacturing.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_9b5f8e9a22a1448887298e7411d526cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapexiw/debonadevak.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/pap_guidelines_ascus_hpv_positive.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_adfec854f5db46f79df06e05c4a1387d.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_c8fc2471da164b958e54d5c283045840.pdf?index=trueIn PDF document text
    • http://zasagugidi.epizy.com/vunifub.pdfIn PDF document text
    • http://mupevisad.epizy.com/what_culture_means_to_you_essay.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_4bdc4d3069c64b489f8d199c122be089.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_a904b5d9c3f54d1cbd1dcf992a61d8b0.pdf?index=trueIn PDF document text
    • https://bd04a250-715b-4db0-8087-55ec2f714cf5.filesusr.com/ugd/0c2191_1f0f323fd63a44b39aba42440bc9dbfa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/aakasam_lona_song.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_62528a53b7554ddf90432fce6f5029c9.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 5428 bytes
SHA-256: 99a0192e2bff3d49d2be3d6ed6423c0cfdd8f776ac611bb7afe91fe147bf367c
font_01_sfnt_off0000db1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1A 9620 bytes
SHA-256: 3dc90a8c84fc788b8b5d31a9993d5ca1e48a41cedbc4ebd53453fcdf24270f36