Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5d0972c2f866bf…

MALICIOUS

PDF

136.8 KB Created: 2020-12-02 15:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4b9e22b6fac31a4a7194d5b503708ef1 SHA-1: dd0698c97864ba03f97ee25758e69953b42d4feb SHA-256: 3e5d0972c2f866bfd7643b371dd6d850a52317ea7e9ef479b2af7f39f2d43c48
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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.
  • 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
  • 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://ggtraff.ru/aws?utm_term=baahubali+1+malayalam+full+movie+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5f9fecd228d47.pdfIn PDF document text
    • https://xabomipa.weebly.com/uploads/1/3/4/4/134484571/8966234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412889/normal_5fbf2e15c13dd.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/f3d6a8a0-7bc2-4b07-a464-cebb56693941/drag_racing_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86aa70f-4271-4f4a-9b77-4ccd5ccfc82b/6164955531.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/biology_class_10_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea49543-9c8a-476e-8999-89e4cd4b5ddd/buwawafubavejutisiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812e6488-e331-40fd-b9ce-ecee69ca9b53/tutubovosilarini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bfb479-73ed-4208-9b09-b5af27e4e2bb/delonghi_fan_heater_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/baldur_s_gate_descent_into_avernus_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a82fcb-76c5-4dce-b203-bd54393208a7/resident_evil_5_apk_rexdl.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/24336316795.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/husqvarna_128djx_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7dc380-4815-432f-9eb8-ce6918538e1d/37105314259.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E12 11132 bytes
SHA-256: a1f01bb787d188ede4a3f55285d81765944226687e8ae39c856604b846da9073
font_01_sfnt_off0001c33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C33B 5232 bytes
SHA-256: 4db9f212223697e3093e3001856d42e7231b77154d2c8dda0c3b76a3d1fccccc
font_02_sfnt_off0001d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4F9 12300 bytes
SHA-256: a434a10381a3a0fce953e7476c2e1a44c3dbf530fee2e5ef80ee4b33cbeea5ed
font_03_sfnt_off0001ff36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF36 16276 bytes
SHA-256: 25dd897e16883aca804fb243c3f368ae83d4a066f4fb90c485db91e7666fe58f

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