Malicious PDF — malware analysis report

Static analysis result for SHA-256 334820519ecdc0f3…

MALICIOUS

PDF

111.8 KB Created: 2021-04-25 15:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b24e23d8343612de28eb0f762782f46 SHA-1: beef6f0bebc4222e57d034a6ac754d09b87ee233 SHA-256: 334820519ecdc0f3fbd6714eb8664a459b2442c57aa3a67ac1b50d6b302a4f02
104 Risk Score

Malware Insights

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

The PDF document contains lures related to advance-fee scams and urgency, suggesting a phishing or fraud attempt. It embeds a URL pointing to 'baarspo.ru', which is likely the destination for the malicious link. The ML classifier strongly flagged this PDF as malicious, and the document body, though heavily obfuscated, contains text related to a 'New Yorker magazine subscription uk' which aligns with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=new+yorker+magazine+subscription+uk
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fe17172b5a33.pdf
    • https://cdn-cms.f-static.net/uploads/4494146/normal_60363961b0e55.pdf
    • http://dodajavux.scienceontheweb.net/68267641690.pdf
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5fd2a5b8e763f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/36645f3b-f533-44ba-9417-90bd2314ac82/zepivogukax.pdf
    • https://s3.amazonaws.com/tevigotu/98739614921.pdf
    • http://kuxemozoxabonag.onlinewebshop.net/26611504853.pdf
    • https://s3.amazonaws.com/zifozujiwi/97783921728.pdf
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_6dc3f938d93148be8789a30e5fcad8ba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5d4e35be-0ea6-4596-a097-55c9053de405/lukeveruwade.pdf
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_80f30805f2ad41a1abf23ccaca8b4a13.pdf?index=true
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_ad5bac5942d04ec0b3c97ef67c57a02f.pdf?index=true
    • https://s3.amazonaws.com/vebenok/zegifulerusijoxaja.pdf
    • https://uploads.strikinglycdn.com/files/6b3af503-c3c2-4134-8d61-244a085c4db9/internal_combustion_engine_second_industrial_revolution.pdf
    • https://s3.amazonaws.com/lovetijif/wogogapide.pdf
    • https://uploads.strikinglycdn.com/files/08f4b166-c38f-4273-963a-3aa739f37a16/lukubex.pdf
    • http://zejibanunepi.myartsonline.com/used_link_belt_crawler_cranes_for_sale.pdf
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_828fa30500214355b4ea3564097eca5c.pdf?index=true
    • https://s3.amazonaws.com/muvojugejoxip/atomic_habits_audible.pdf
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_9779bfad08264453ac5b03ed8869c363.pdf?index=true
    • 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_off00017472.bin
ebc3d2e7f720a8f9b63e631e65acebebabcf7ddc46990923c28f7a96613fb66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17472 5640 bytes
font_01_sfnt_off000187bf.bin
cabe384cf4026c7c5849380b2a32f09808c776c4febf1fd2d238d58f69d9a3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x187BF 12868 bytes

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