Malicious PDF — malware analysis report

Static analysis result for SHA-256 363da99a28a63974…

MALICIOUS

PDF

77.6 KB Created: 2021-02-28 02:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c981985021404dd440747a1080040153 SHA-1: af60724a0d7292dacde28a7406f8fb510c301e8a SHA-256: 363da99a28a63974decb4c06560f4065e4a8e230138e5a33f4c676b8121568cc
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing or trojan variant. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/123?utm_term=what+machines+to+use+at+the+gym+for+stomach+fat PDF link annotation
    • https://cdn.sqhk.co/nedabuke/hV3jfOz/red_and_blue_jordan_1_fearless.pdfIn PDF document text
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/dibexa.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/dghIgfm/silicon_valley_season_6_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/fiibjdG/kaspersky_mobile_antivirus_applock_web_security.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/jAzhbFR/90948115848.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/ih0PMgc/ejemplos_de_analisis_foda_personal_y_profesional.pdfIn PDF document text
    • https://cdn.sqhk.co/gerukoso/cjbhcif/lojekefemofuxigivaxuj.pdfIn PDF document text
    • https://kugijibogizupe.weebly.com/uploads/1/3/6/0/136055246/wuwiwexenemen-sijilukozi-fupiwotaga-womezedin.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/RhdggWA/10784463673.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/j0jg8R9/101_in_1_games_hd_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/iegdqjh/wildscapes_hack_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralirajuz.atwebpages.com/vemizosagadunufupa.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/free_adobe_premiere_templates_wedding.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 5376 bytes
SHA-256: 50738f9d6fd72192593fa8d860d38ef97b490562b21d20b9c8b06b0a958824b3
font_01_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 11048 bytes
SHA-256: fafa2eb49a2de31e01e6898dd51dabd3999763a78126482a0d9331ead819c7bb

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