Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafbadb0c4521357…

MALICIOUS

PDF

71.4 KB Created: 2021-03-23 02:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 166a18102668d6fd4bdb40c9a81b4831 SHA-1: 53903fe78f914e0f28eba41cb27cf5423a739f61 SHA-256: fafbadb0c45213570b67a033535b515e9f2e8abdd6ff7ed29ae09e0dd647e61b
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 0.9998

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://xezojetit.ru/aws?utm_term=john+grisham+boone+books+in+order PDF link annotation
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/b8a08c.pdfIn PDF document text
    • http://degimogug.mypressonline.com/how_to_fix_a_water_softener_leak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_5fe1712792ed8.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/xoganavaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444638/normal_6050c686bcce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_6052f72f1c7fd.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/learn_english_grammar_in_urdu.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/881d8a6.pdfIn PDF document text
    • https://terekutididir.weebly.com/uploads/1/3/0/9/130969195/jupoxedidobumavutiz.pdfIn PDF document text
    • https://jabekidedur.weebly.com/uploads/1/3/1/6/131636775/wukorawanet.pdfIn PDF document text
    • https://gonagulinifuf.weebly.com/uploads/1/3/1/8/131856247/voxipipofed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_604edb1774dac.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/gosugewujov_tawin_joxukawevu_tivonukeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_605578366c9b1.pdfIn PDF document text
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/6515811.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/xiwep.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/how_to_find_street_view_on_iphone_5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/totin_chip_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/vuxibola.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/morattu_single_pictures.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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 5400 bytes
SHA-256: a2d8ebf13781bcacbdec12ba9158b10ed99eb5f4ce25fc2a22a89bf586058936
font_01_sfnt_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 10708 bytes
SHA-256: 690b3329c91b4b775bd963039b7ed317c467368478c6854246006c2c6a1232ca

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