Malicious PDF — malware analysis report

Static analysis result for SHA-256 883a22639df7250b…

MALICIOUS

PDF

73.8 KB Created: 2021-03-11 17:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e020668581340243d2ee1eff31ce951f SHA-1: e04426bd296e4f95e82c484f9cac3468afc88c38 SHA-256: 883a22639df7250b895b41a34c1ed212f10872e9085fdfa946d047ee907f7b45
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains heuristics indicating it is part of an advance-fee scam, specifically mentioning lottery or prize language combined with parcel delivery requirements. It also contains multiple external links, with one prominent link pointing to a URL that appears to be part of a link farm designed for SEO manipulation. The ML classifier also flagged this PDF as malicious with a high score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=rent+to+own+homes+in+lansing+mi
    • http://topshops.website/ripebeberurumipeziwib41dbu.pdf
    • https://jarufepijup.weebly.com/uploads/1/3/0/7/130776730/wenukikigatir.pdf
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/2314786.pdf
    • http://fusavexupisedi.iblogger.org/tupejudipexawisewuzikaki.pdf
    • https://lujotasapamuxa.weebly.com/uploads/1/3/0/9/130969194/8047897.pdf
    • http://thecet.xyz/celf_preschool_scoreshum6q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/99bfe468-09ec-4b3d-a5d2-4c42b687b3be/19572638331.pdf
    • http://memapekoge.epizy.com/xepotanon.pdf
    • http://pisibagavorinow.epizy.com/timeline_of_biblical_history.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/anticoagulation_chest_guidelines_2017.pdf
    • https://s3.amazonaws.com/xomepixo/nolev.pdf
    • https://s3.amazonaws.com/towutoginadivu/6546371544.pdf
    • https://s3.amazonaws.com/tedowafomaru/41973776467.pdf
    • http://woxariwete.rf.gd/vocabulary_test_template.pdf
    • https://uploads.strikinglycdn.com/files/6f3a4e4f-272a-4cd6-b92c-7edb9a9fbc24/stranger_things_theme_sheet_music.pdf
    • https://s3.amazonaws.com/vofadoloves/hello_when_answering_the_phone_in_chinese.pdf
    • http://xatonidimo.rf.gd/36147340076.pdf
    • https://s3.amazonaws.com/jigezilor/tijifelozoxixajanona.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_off0000e4f3.bin
f9b885437e353a1c46ae51c214cda370486162d9b7e4b7913df0de5922aef550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 5100 bytes
font_01_sfnt_off0000f63f.bin
18eb2aaabae8c76f0117d442f13a699815cfb2369c9597dfd6f91228b919d2bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 10440 bytes

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