Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3971063230a971…

MALICIOUS

PDF

66.6 KB Created: 2020-11-24 06:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7672cd739c78c8304f8b1c62ce8518b1 SHA-1: e2404be4f213d17a3af9c6ef340fe3f4ec7b16a8 SHA-256: cc3971063230a971d0c9f7341da68127cf354ce0e05280e7aa01866bf456523d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the link farm suggests a mechanism for directing users to malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=conditional+type+3+exercises+with+answers+pdf PDF link annotation
    • https://vokobilozo.weebly.com/uploads/1/3/4/2/134235622/4782265.pdfIn PDF document text
    • https://vowesajakekefi.weebly.com/uploads/1/3/4/5/134513426/nasajanigi.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/19f9f954449560.pdfIn PDF document text
    • https://rozemubopul.weebly.com/uploads/1/3/4/7/134719755/xofedenox_wumebukigi_fudukovil_lisupomatiwi.pdfIn PDF document text
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/laxukupeduzawe-fodamegizum-pamamubaxuzel-xajozovakerobu.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/namitubi.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/f503938416fe9.pdfIn PDF document text
    • https://tovoginimu.weebly.com/uploads/1/3/4/3/134379987/bevikumofiwigeraxup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b452d27c-2f5d-4690-8994-2acefc0364ae/83420792633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5acc1154-0102-4544-99aa-a746330aa848/kegupaxinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c325d2c9-48e7-4213-8ad0-56379774c8c6/tubemate_2.2.9_download_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f249ac-d53f-4dee-a1aa-26a3b3ab39ca/13321428946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b60c26e-825b-4407-9eea-61e805ef6ecc/the_sims_medieval_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d6b805-92b7-419c-ac25-c9493f5a7365/public_policy_politics_analysis_and.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e94ee9-87b3-4659-a7d9-d91d54003405/14073150111.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB856 5480 bytes
SHA-256: 08c762554aabc28f7500e2104ed1965b71b14ccd34568c67d352eb44d427ffb9
font_01_sfnt_off0000cb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 10548 bytes
SHA-256: 3777313e48b77147357267ff79d42330aa3e34eb596146d50936488daa722fd9
font_02_sfnt_off0000ef53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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