Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3daee4851b214f…

MALICIOUS

PDF

84.0 KB Created: 2020-11-14 08:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37bfbbd16f81650bf080cb8141710336 SHA-1: d1428ba532c2a4074f8587b00d8ecf29e124e739 SHA-256: 5b3daee4851b214f2b65fe2943edb70b3fe92d59dae3d4605c8cc4829e9235cb
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, including language suggesting urgency and a lottery or parcel delivery theme. It contains a significant number of external links, forming a link farm, and was detected by ClamAV as a phishing trojan. While no scripts were explicitly extracted, the presence of external links suggests a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://trafffe.ru/123?utm_term=disney+on+ice+omaha+march+16
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/dodowivezitoj-mubabo-puveludujolefas.pdf
    • https://liguroxuf.weebly.com/uploads/1/3/4/4/134443360/negojilaje.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/bumesuwepupik-korepemu-ludilunudavukiz-vuzagomasanakex.pdf
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/porubukuza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nagev/apk_marketplace_app.pdf
    • https://s3.amazonaws.com/bisute/69722530328.pdf
    • https://s3.amazonaws.com/degisapemifa/15321143663.pdf
    • https://s3.amazonaws.com/febopa/zowaguvurinofijibopizu.pdf
    • https://uploads.strikinglycdn.com/files/4655e2f1-2d88-40e0-be58-814c4d8abe7a/zanupudizoboriforotireru.pdf
    • https://uploads.strikinglycdn.com/files/60c755f5-19d1-4a07-a33e-f266ee3b6cde/5273542191.pdf
    • https://uploads.strikinglycdn.com/files/993e31b8-4d5a-4b2a-963a-288f122a41df/24926567864.pdf
    • https://uploads.strikinglycdn.com/files/f046538b-b72a-4275-9231-f8541d275680/polk_audio_subwoofer_psw110_manual.pdf
    • https://uploads.strikinglycdn.com/files/84c44587-bcec-4a2a-849a-399397277881/new_vegas_strategy_guide.pdf
    • https://s3.amazonaws.com/bewibiwat/candlestick_pattern_cheat_sheet.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_off00010a99.bin
f6fef06ef9e8b764fa23f631b03fb82dba050a00a358242a63f5f91b8b0e8113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 5312 bytes
font_01_sfnt_off00011c8e.bin
e169fb696dd279b8adc5602d6165b12628d90ad9689f8acb9a7097790cf7523b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 11460 bytes

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