Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb69979aebf7416…

MALICIOUS

PDF

64.7 KB Created: 2020-11-11 01:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 75588891e35f9ea80d690ab631b8389e SHA-1: de42a9dd54cea1362af35f819328c3d67a9b2cb8 SHA-256: 5bb69979aebf7416aab0d601f8634354fade975eeb3097e57472cfe6e89fa6ee
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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?keyword=tuscaloosa+arrest+database PDF link annotation
    • https://mimejomukokije.weebly.com/uploads/1/3/4/5/134510045/fexemotiwa.pdfIn PDF document text
    • https://sokonova.weebly.com/uploads/1/3/4/3/134322069/nixedo_jizawed_sofoluvonu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://detaliwaka.weebly.com/uploads/1/3/4/3/134340587/guranapuxud.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/8622241.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/vulib-mekoge-jisudiga.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/zumobewub-xunupewodew-suside.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/zosevid/xakifimiluzab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ac68ff-d910-4f2d-bdad-a54c900400b8/2021780035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ddfdce3-87c4-4298-a031-fa51524e01cd/nevavuxonekobugufelepi.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/usa_test_prep_answers_for_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165d10ea-8a36-4a5e-b7f6-853eddd833d3/tovusomemavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6572b0-03b4-4b96-9375-ff1964a7dbc6/kemonomado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959874ca-2815-4892-afa1-dcc2f6e68986/homemade_rodeo_clown_costume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ec0d48-81b0-4da5-b942-61c2842c0cc2/tadawawedorizil.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_off0000c22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22B 5020 bytes
SHA-256: d57b0aca7d278364d561bd154ca89368e04fbd16e1e37dfe60b1ea166da6a772
font_01_sfnt_off0000d340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD340 10432 bytes
SHA-256: c7507deaffff0fda0011f3a33134b22abb8df1525c42c214c4388dbac64ef569

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