Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b4cfd2b2b50813…

MALICIOUS

PDF

78.7 KB Created: 2020-12-30 04:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: adea82966e656b4f54698b1c65061e0a SHA-1: b8f88cc46759a8af9bb06884a9e7b8ac537b0a04 SHA-256: 62b4cfd2b2b508130e7ee99d0cd33c310a27d9ed43cd7deef8766140de4d4d03
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'Ufc tonight 248 fight card', suggesting a lure. ClamAV and ML heuristics confirm the malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/strik?utm_term=ufc+tonight+248+fight+card PDF link annotation
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/wisakiburoz.pdfIn PDF document text
    • https://fopudodesesiwen.weebly.com/uploads/1/3/4/3/134344932/vowiraxoxalu_tewuvalezewuseg_temomiwizon_rupusi.pdfIn PDF document text
    • https://fedufifor.weebly.com/uploads/1/3/4/8/134894833/693085.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/9472121.pdfIn PDF document text
    • https://dewubonate.weebly.com/uploads/1/3/4/4/134466502/sekofeje.pdfIn PDF document text
    • https://tapituxupali.weebly.com/uploads/1/3/1/3/131382330/bc15a3f9e5.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://kovumagamu.weebly.com/uploads/1/3/4/5/134578336/6658711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/39cfe063-0d4e-4eba-b782-2927e171a9dd/68685468125.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/happy_birthday_songs_for_adults_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7760d2b-53fa-49f7-8665-67084d3182ee/33601825357.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/al_quran_terjemahan_indonesia_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/chogada_tara_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/loft_living_zukin.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/friv_2018_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/76730289090.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 5148 bytes
SHA-256: 9f3a056dbcd8b53fc24c87f52e9e0cd781f4d41bdfeb528e08f70281d6c38a6f
font_01_sfnt_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 11672 bytes
SHA-256: 0497885b597b8c9419b26a63ba10c60e2e6161bd4ff5728f627a08aea1113362
font_02_sfnt_off00011fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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