Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cce67e344b0eac…

MALICIOUS

PDF

89.7 KB Created: 2021-03-11 02:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e6759952e1a9e19acc23a126dc884319 SHA-1: 98d8108d0fd283868679b6bd6f477906a7140541 SHA-256: 30cce67e344b0eac0cae8ff866164167f14cb75a89c27815544a805943e1641b
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a tactic of redirecting users to potentially malicious sites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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.
  • 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://bologen.ru/strik?utm_term=farberware+oil+less+air+fryer+recipes PDF link annotation
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/27eb49f4e03ab7.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/11ed7.pdfIn PDF document text
    • https://wotutokope.weebly.com/uploads/1/3/5/3/135315373/tokabo_makiveges.pdfIn PDF document text
    • https://didosetugub.weebly.com/uploads/1/3/1/6/131606008/pufapofito_gikononafo_zewugale_mukutovo.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/phc3jcQ/45477183620.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/dapimajamigudo.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/wikizimabon_tiwididum_sepobuveg.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/d51f870b.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/tibafakuvisig-makuxatupi-mejaluwexulu-gulirivefab.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/bazukafuwoke.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/8295906.pdfIn PDF document text
    • https://dovomarolod.weebly.com/uploads/1/3/0/9/130969455/1333759.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/sI3iaf2/that_s_life_mac_miller_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/barevirus/dhgjKdi/ac_odyssey_atlantis_dlc_review_ign.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/jYheigX/77043194631.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/jjFCCha/69711373244.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/3538336.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a69db7-a418-4268-9e93-f18ed902ec6b/chniby_demo_koi_ga_shitai_light_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def67f51-ae88-4909-88d1-91f13c539f45/92004308615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca343bc-da49-42bc-b92c-205d079860fd/96257642195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e4f513-0ffc-4d27-b188-c4ef5de859cc/shortcut_keys_of_ms_excel_2007_formulas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc8c236-b790-49a5-98d4-bab517c453df/55289385728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecffd0f1-2ae0-44e2-9b30-effae1f9cd58/easy_french_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fd91a6-699e-47ac-a7bb-a0f07226b3e5/xurir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a4eecc-156f-4599-b77a-4991ca61d91b/nursing_teas_guide_quick_study_academic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89046e3-4554-4825-ad63-86b9a4cbbee4/97296266381.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_off00012066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12066 5300 bytes
SHA-256: 7aab6b35fd999dc79c5b09c086f85b0557b0ee02db7ab44b14e419d6b47544f5
font_01_sfnt_off00013295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13295 11608 bytes
SHA-256: 7d4a1d956aaca3809299c4eaa2523c60d91a99fcdede4d28b3c8b277defc79f6