Malicious PDF — malware analysis report

Static analysis result for SHA-256 001ee9eddcfb7063…

MALICIOUS

PDF

71.8 KB Created: 2021-02-20 04:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33c5e189c0668015d4e9d7fd533008f5 SHA-1: c1a008fc236184cfa77e60ca45792509f7c469b9 SHA-256: 001ee9eddcfb70638dcc0e780fbceb43218bbe2980d74e1a70bc04a66aa6cc6e
244 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is a phishing or trojan delivery attempt. It contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, suggesting a link farm designed to obscure the ultimate malicious destination. One critical heuristic identified a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=intel+audio+driver+for+windows+7+ultimate+32+bit In PDF document text
    • http://soldonlittleton.com/40603662716qejer.pdfIn PDF document text
    • http://mazanatur.space/65849678472iyvbd.pdfIn PDF document text
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/7142082.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/bifaniguver-wijam-galanumunadipu.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/1507245.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/V1URijH/minecraft_worldedit_plugin_tutorial.pdfIn PDF document text
    • http://eduha.online/video_editor_using_apple_music7aoai.pdfIn PDF document text
    • https://wavixozuxukoreg.weebly.com/uploads/1/3/1/3/131380445/birulosuro.pdfIn PDF document text
    • https://cdn.sqhk.co/nibijegun/vehaahi/assemblage_sculpture_art_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/hgegggi/lesson_plan_example_for_preschool.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/bhhMhh0/suzozemopozeruxu.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/626f1ff1.pdfIn PDF document text
    • http://sadovik.me/recargar_saldo_gratis_en_cubac5v1p.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/189529.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/dheiahi/zemebaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riwugenesujo.epizy.com/a_kannada_movie_video_songs_free.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_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 5656 bytes
SHA-256: ca3e00f326a72e2913b9a9de7538f58db6a8809d6e3c1a039abb762210785ca3
font_01_sfnt_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 10916 bytes
SHA-256: 5e4b1a5ce09d76f9b05f13ebcbd4d5423d4732c3f0cf6a4c8714e267d10acd0a

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