Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcab060432ea22ff…

MALICIOUS

PDF

103.4 KB Created: 2021-04-08 09:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee6707ee51bc2e12b0beea682ead7ad SHA-1: dde8de95245ab88385ac6ae018894083730025c7 SHA-256: dcab060432ea22ff99c03ec083c24a096649c4f5bce19fe2a68eb29274b0dad5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. ClamAV and ML classifiers strongly flagged this file as malicious. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=new+testament+greek+bible+online
    • http://xsafak.com/navudafokonl9v36.pdf
    • http://cabinetsly.xyz/warcraft_3_remastered_review5su5o.pdf
    • http://bovibuvebus.getenjoyment.net/robino.pdf
    • http://psyhologrzn.ru/647293514594zd43.pdf
    • http://gachihyper.xyz/samsung_dishwasher_dw80r5060us_installation_manual91ro8.pdf
    • http://strongcreditscore.info/mirna_and_sirnarvwff.pdf
    • http://itawegan.fun/auto_tune_7_crackd4e3w.pdf
    • http://streamsweets.com/flexible_budget_report_meaningw8og3.pdf
    • http://wgathering.org/wegilegomalatumulis.pdf
    • http://igcopyrightforhelps.com/dometic_rv_air_conditioner_not_coolingimahz.pdf
    • http://nokasosozigof.mypressonline.com/9909448038.pdf
    • http://getsalle.xyz/nojiviluxv0vc5.pdf
    • http://vozivovog.scienceontheweb.net/30471833387.pdf
    • http://gnatural.space/xovazole8fiyr.pdf
    • http://puzivulagu.iblogger.org/sharp_cash_register_er_a320_ink_roller.pdf
    • http://sumapewub.getenjoyment.net/binary_search_tree_deletion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/af6626fb-1278-4ef2-ab5e-c9c313779353/78080153906.pdf
    • http://zitasixan.atwebpages.com/parasitic_diseases_despommier.pdf
    • https://uploads.strikinglycdn.com/files/f323fdf5-1a7e-4079-8b6d-33f59f47e3f2/how_to_reset_my_lg_tv_remote.pdf
    • https://uploads.strikinglycdn.com/files/9728061d-75e3-4107-9ad4-c0cdf0e01431/22005994655.pdf
    • https://uploads.strikinglycdn.com/files/27af43af-8c4f-45ad-a441-06cc6cb324b9/kenmore_he_top_load_washer_cleaning_cycle.pdf
    • http://pesesuzokofa.epizy.com/newidawazipax.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cb3.bin
2e091b12404c8790b3aed5a7bf80c9e3405f7052fcd46425dea1372b48eeb7ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB3 5268 bytes
font_01_sfnt_off00015ea5.bin
05ea466c5d1a93656f8a58f298a138ddc078defa4a2f03b1984425caef459d2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA5 14508 bytes

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