Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae2d7cc2f6e2307…

MALICIOUS

PDF

81.2 KB Created: 2021-04-04 15:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8d0fabb403f8021aaf2c1151d48ae739 SHA-1: 0a6d605ca69283b927855aa01f16831d2a4d422a SHA-256: aae2d7cc2f6e23078198f6619e0d7fb9f338d019f6476818e1c57421f05761b7
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning model as malicious, specifically for phishing and link farming. The document contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious sites or download further payloads. The 'SE_CALLBACK_LURE' heuristic indicates a phishing attempt, likely to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/strik?utm_term=ti+34+multiview+calculator+yellow PDF link annotation
    • http://korogesubelokut.mypressonline.com/supply_chain_management.pdfIn PDF document text
    • https://fobepuwup.weebly.com/uploads/1/3/1/0/131070598/35b9707f8e6aae7.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/18135e07c2.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/5x1ihhe/88198758710.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/hfiagf5/kariluk.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/zifisiviwa.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/burutelurapexubogafa.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/Ghgb7jg/edge_lighting_app_for_iphone.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/astrologer_s_day_by_rk_narayan.pdfIn PDF document text
    • https://cdn.sqhk.co/gidowoji/veiaihg/89225571120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_8b99597cacff49c2b4da50a61032f0a5.pdf?index=trueIn PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_f89e889012aa4b7b9c47249e135e30e4.pdf?index=trueIn PDF document text
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_5d8b0d39a91545fc8c504f6e53141f3b.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_9a53560345124dacb85c324c113ac326.pdf?index=trueIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_bf435262d2bf4ca5ad9b95009b5950ee.pdf?index=trueIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_8daa5d2eaeec489287bba07d48bdda48.pdf?index=trueIn PDF document text
    • https://b0b89e74-75d6-43b0-bb8f-fa2cd9bd5f5b.filesusr.com/ugd/b5ae3e_634b2d77804d4d75be5576d295ef5b88.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_76989d2d26fb4eefb8da8c690c8151a9.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_c3e7157bbc534e11bd4649f50bd092cd.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_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 5224 bytes
SHA-256: 833297bcc272d0d1d620497043fc906d16ec5be5a73ac93e10d8159f711be6e2
font_01_sfnt_off00010a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2A 12888 bytes
SHA-256: 55eb81a6e3a91c16069c6039ac9911bfe3c03b9fc420fe2e0369496639124eb9

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