Malicious PDF — malware analysis report

Static analysis result for SHA-256 07361290bb4a479e…

MALICIOUS

PDF

78.8 KB Created: 2021-05-17 16:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09dc930083087daa182af55c4142407a SHA-1: 9f13df9de2012ec64ed5ebae94bdf52bd0e40950 SHA-256: 07361290bb4a479ed2c59ae07bb171f032f9a839067650ccfb1bd9ad3a027648
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=will+cyberpunk+have+multiplayer+in+the+future PDF link annotation
    • http://labincom-med.ru/kadhal_kavithai_movie_songstuqme.pdfIn PDF document text
    • http://itanto.space/how_to_fix_a_washing_machine_that_does_not_spinhxmey.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/jefosebugudi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483359/normal_5fe0a8d04fb1c.pdfIn PDF document text
    • http://bbflowers.net/lies_we_tell_but_the_secrets_we_keep_trailergrz4g.pdfIn PDF document text
    • http://hisgohar.site/university_of_colorado_boulder_average_transfer_gpa9puf0.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/5513095.pdfIn PDF document text
    • http://sewenosafi.22web.org/2175609313.pdfIn PDF document text
    • http://prizinsta.site/gigizexawijozipugekujo6zbq2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_605ab13225dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_5fea2949c6575.pdfIn PDF document text
    • https://tegupovo.weebly.com/uploads/1/3/0/7/130775278/8264523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokakowevokeb.epizy.com/national_library_kolkata.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_d46bc7f9ce694f1eb575c675aec32408.pdf?index=trueIn PDF document text
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_3b47050a965f4817bd9c985af8ac0693.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_056bb777650a4b89bdbb8cf4533e349a.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_10808f1d86f54e4c99b2c505781e040b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/35749335825.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_9433d503a8ed42a080224c4258cc8231.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/guidelines_for_pelvic_inflammatory_disease.pdfIn PDF document text
    • http://fomabobas.epizy.com/87302770322.pdfIn PDF document text
    • http://fosixijikalapi.epizy.com/gatufigewu.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_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 5456 bytes
SHA-256: af85bed729ecfd3e4adeccacd1f2ee5e407e782283a159e8e72573978ae7df69
font_01_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 10716 bytes
SHA-256: 377243ff8bfecc86c07a4f0fe5ed1276d5a1c7443321f3ad895a629d0fe265eb

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