Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9242eecbacde4f6…

MALICIOUS

PDF

96.6 KB Created: 2021-04-02 03:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 254f0408b41c602e5995a6e9bb9229d5 SHA-1: 45f876292fbc5d79c75f58df5b8233a2655a43c7 SHA-256: d9242eecbacde4f6e74ab86b2828458c8966d86b3b2cba98dc4054321ebc3676
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, including language related to prizes, funds, and parcel delivery. It also contains numerous external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the presence of PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS heuristics, along with ClamAV detection, strongly indicates malicious intent, likely involving the distribution of further malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/123?utm_term=tv+guide+freeview+christmas+films
    • https://cdn-cms.f-static.net/uploads/4369493/normal_605d587380b99.pdf
    • https://cdn-cms.f-static.net/uploads/4406456/normal_60470845827f2.pdf
    • https://cdn-cms.f-static.net/uploads/4375209/normal_606003be1ff80.pdf
    • https://cdn-cms.f-static.net/uploads/4487658/normal_605f61789616d.pdf
    • https://cdn-cms.f-static.net/uploads/4489852/normal_5fdc445f7cb7f.pdf
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fd652497f6e6.pdf
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/8470422.pdf
    • https://cdn-cms.f-static.net/uploads/4404123/normal_602938b36ef88.pdf
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fd66df329acf.pdf
    • https://bukiwajomudaf.weebly.com/uploads/1/3/4/4/134437050/kaxafudiwuvipikolora.pdf
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fefd5603a864.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5fd635c6545a2.pdf
    • https://weromosamewose.weebly.com/uploads/1/3/4/2/134265498/powutanuginava_worijamisafuw_tafaxet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_d1b1fbd30e23457c939948fb86b8ee61.pdf?index=true
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_09d95b9f94b64bdb92faf141946f43e4.pdf?index=true
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_a8d00036fc3349c89201ae3b187a9435.pdf?index=true
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_d2c6c9de6a734264bd9eed8a9bd232e0.pdf?index=true
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_8a109f29dcf44337bda7053b57183f53.pdf?index=true
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_6dd2d0aac2c3439abf2232aaf82e0198.pdf?index=true
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_dbdd01cdb27948c4905643aaa76fce90.pdf?index=true
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_1ff4be9f914d41bbbfc2d259b0697040.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_off00013ba9.bin
989a947f062f1bbf12aac4ba42fba84c68ba4fc6678df76eb06f263f78fd2c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA9 5536 bytes
font_01_sfnt_off00014e6c.bin
68574dff220cb1722511e45dd37f95c36e9efca797338ff734bc0bb4f9342768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6C 11352 bytes

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