Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fa83d3897dd385…

MALICIOUS

PDF

58.7 KB Created: 2020-12-31 12:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ae6b36e42d362ddcf5e410af04f5cdc7 SHA-1: 61b5f561a4591b702d998cad25dac93e22a39c25 SHA-256: 89fa83d3897dd385fc214c7a427e6a8d735de34fa69ce84f1aed0eda810ba664
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain likely used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=mobile+png+download+with+hand PDF link annotation
    • https://nulunofelixor.weebly.com/uploads/1/3/4/6/134646046/e2cdea5309.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/iWihidl/fallout_shelter_online_release_date_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/gg4hdjs/ultimate_racing_rc_tools.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/bejeseja/iron_and_pseudomonas_aeruginosa_biofilm_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/idaho_odometer_disclosure_statement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/after_effects_cs3_project_files_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c194dc22-aee3-4469-a201-84dd58641108/22686002738.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/54306592405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eee1dd8-4ff0-46de-8516-618e41409117/watuvamozebokatekonafux.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/66387999565.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_off0000ac92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC92 5184 bytes
SHA-256: e49c5572d243f8d61fd5a5836bd09e91efb7e5c5c9591f544cb74a2b8ddea6ac
font_01_sfnt_off0000be4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 9440 bytes
SHA-256: a3371ea1b927c7ab7b179c2673fb459e8156f4482e3dd6448cc93c668fbeeffd

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