Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53fdb29246e901b…

MALICIOUS

PDF

69.9 KB Created: 2020-12-19 09:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 802a4af4a42c7becb1613f3df9314f2f SHA-1: d86df53171908a1177638ce0cf34b7d6e0d66484 SHA-256: a53fdb29246e901b15709d87f2abd429c2610fe497b3bcff9bf5796e8ec88840
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains embedded links pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://gettraff.ru/strik?utm_term=ark+managarmr+saddle+id. The document body is heavily obfuscated, but the presence of malicious links suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=ark+managarmr+saddle+id In PDF document text
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/c5958ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd5ab3b-2c8e-4dd1-bbdb-d741e6e72b0a/confessions_of_a_shopaholic_full_mov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2bfc33-c10f-4447-9193-288693b62463/demagizojefenilof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5f9d75-3d00-4375-8f1e-4f1f4465017c/72345719434.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/39469035778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2b1100-3d37-4dad-98cc-1adc1cd33cbc/a_concise_introduction_to_world_religions_3rd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4348eb5-c25b-477e-999d-46ff280ed6d1/sarixukozetutibesosatuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e730020-f10f-4002-9b77-428e6ea4315a/fozogolirimifofute.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67bdfa8793968642e8bb7/t/5fc994fd87b36f46d4f7f270/1607046397608/51230647700.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce43840db0542b884efe37/t/5fd00632242cfd39fdb372f8/1607468595317/al_kahraba_vs_al_naft_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7867a877-5a0e-4508-b9f1-a8091ba094e4/insignia_1.7_mini_fridge_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef226de7-b309-4896-a2df-5ac7516a26d0/what_is_a_cordis_catheter.pdfIn 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_off0000d64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64D 5200 bytes
SHA-256: 5446283527591d50eb3943f790dc67318fd7707c09e4deaa898d44c1580937b5
font_01_sfnt_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 10304 bytes
SHA-256: 6586fbb229acf91cddcfdc8547c5d2bd79db5312ff7d3ef0fd4aa10138dcf775

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