Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbb69a92333031f…

MALICIOUS

PDF

85.2 KB Created: 2021-01-13 22:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c7b03b142cc8045fb102c670b142018f SHA-1: 6d9ab6e23cc0cc90a513dc3359c47fddbd30eadb SHA-256: afbb69a92333031fbd64acaa986184c5019e431996c7b81ec6d1fa448e22d46e
214 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 SEO link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and heuristics strongly suggest the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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
  • 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.
  • 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://gettraff.ru/123?utm_term=hantek+dso5202p+manual+espa%25C3%25B1ol In PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5fc979ab07dbc.pdfIn PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/zijan-tivututetimadi.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/gafopupotavedep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501645/normal_5fdd3595bcb54.pdfIn PDF document text
    • https://meverofukibax.weebly.com/uploads/1/3/4/6/134620555/jabimirat.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/Zhhhche/phoenix_wright_games_timeline.pdfIn PDF document text
    • https://lowisaxov.weebly.com/uploads/1/3/4/3/134361609/kumekagon_wapojig_mirorugo_xewitok.pdfIn PDF document text
    • https://farukipem.weebly.com/uploads/1/3/4/4/134473356/zomoxuwoxijoxa-suteguvuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_5fa57e55b5eb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/character_design_art_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/vampire_diaries_season_1_eng_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/all_tools_apk_pure.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/56169807421.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 5644 bytes
SHA-256: b6875126298f205ea6f5893eaf8fff2faa7748e431e65d4c8d7068e236f14fb4
font_01_sfnt_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 17624 bytes
SHA-256: c6ea3f69371b318a3b3bfb1d4cb1c9aa34fbc648e17fd16d6da63aa7eebe449f
font_02_sfnt_off00013046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13046 16120 bytes
SHA-256: 1e30c75f6e71caf2423b769ac2f242f0931706cbab99f38508be268240ea8c52

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