Malicious PDF — malware analysis report

Static analysis result for SHA-256 f397e9a3b968c288…

MALICIOUS

PDF

106.5 KB Created: 2021-03-03 01:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 515e1676bd183ab6cf92d5c728b4abb7 SHA-1: 0b09ed135c3d808ab3c0b5b220661d194cb79dc5 SHA-256: f397e9a3b968c288efbfd87486b2d60d0cd47f583c4d79ede8dfd006de950b79
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as phishing and potentially a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards malicious activity, likely involving the distribution of further payloads or redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=beats+solo+wireless+2+release+date PDF link annotation
    • https://cdn.sqhk.co/lesasafo/jL9ice9/tomutawodewodapipatig.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/diablo_2_armor_runewords_by_rank.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/7dad08d72.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/jodisikikib_danen.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/Nnnhdhh/tibumalaxen.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/NMqCje3/77078084529.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/lixuduwonifa/reporters_questions_collectively_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/introduction_to_italian_public_law_download.pdfIn PDF document text
    • http://gedawov.epizy.com/25572935416.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/vajalusuwutoxofexugafa.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/foxawelodidobaxoliputo.pdfIn PDF document text
    • http://xewinawe.epizy.com/18375894633.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/construction_tender_acceptance_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/adventure_communist_guide_science.pdfIn PDF document text
    • http://lafebevu.rf.gd/gumej.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/ribusosefewixojewigekew.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_off00014a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A30 5092 bytes
SHA-256: fde934775a8c74afcfbcc133946ee81300f43fba82616ab9c571a8ea9bc141d3
font_01_sfnt_off00015ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA1 12684 bytes
SHA-256: 4945bbce5b8a7f933a1247a733a4fe8c89789a6a7a27e07d8c313321ebebc23d
font_02_sfnt_off0001860a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1860A 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

Open this report in the interactive analyzer, or submit your own file for analysis.