Malicious PDF — malware analysis report

Static analysis result for SHA-256 042b3659957af429…

MALICIOUS

PDF

73.2 KB Created: 2021-02-17 13:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 740ea7a71e0768f4be26ad835cb0985b SHA-1: b5909e6fb236b5cbd1d9d04bbdc8240e4cc38aed SHA-256: 042b3659957af4296bdbf828018fec11005f2b859d1f40d14144bfb473f702f9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'Federalist paper number 73 summary'. The presence of an external URI and the overall detection points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=federalist+paper+number+73+summary PDF link annotation
    • https://cdn.sqhk.co/kewawukufiju/aLjfPgj/north_star_casino_bowler_wi_coupons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366965/normal_5fe3d8cb7f4cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5fe2c5ed2f4ca.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/cijxgg9/dajagofutinomuxalisipu.pdfIn PDF document text
    • http://sanadewa.iblogger.org/54666786610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_5feb467700ebb.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/CA7jdKo/gipodoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60143716747bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_6021fd26dd5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_5fe9d2707ea87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5ff7ba0b71201.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/NXjf1ge/hornblower_cruises_chicago_office.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/ihKGjgT/rixabejiwewanerun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vufilupirudote.rf.gd/90529463279.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/android_graphql_subscriptions.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/tusibetawojo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 5544 bytes
SHA-256: e8651af6cb6d51fe246c83b3f2afab035184d891a24d22a08574eb480dbb91c6
font_01_sfnt_off0000f720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 9644 bytes
SHA-256: cde62edc6d2519bccb8247207f6fe3a478d0a849e85a7da4c83c28630f40cc34