Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6713c51a25c213f…

MALICIOUS

PDF

79.6 KB Created: 2021-03-08 16:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d00c7d50b48ff8e3f448f30b01fb50ae SHA-1: 92998cb2db90604d911b79e99113f4017d6b8e26 SHA-256: e6713c51a25c213f3f3f555a2297a792038e4e744c8733675ece634a1d5c5af6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=how+to+check+a+furnace+ignitor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501037/normal_5ffbdf5d9ff20.pdfIn PDF document text
    • http://kigetipopizatij.getenjoyment.net/58149675683.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/ibPJhb7/26755840733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_600a913a24b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_6018507e76edd.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/sotatamurapirapivewipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_6043203e234de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393638/normal_5fddfce0b8a84.pdfIn PDF document text
    • http://tadurarawi.mypressonline.com/mofogumuwegejolodatox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_6031674029b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_5fd5fe9602d22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483856/normal_600217484f879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_601123a11d5f5.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/jdZPpge/sikidutuzurapirorupugivuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5fda81ec2adfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_5fdcb217bf74d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fcf7d9c08868.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/bhjeDcr/unblock_ball_block_puzzle_apk_indir.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
    • http://situwosase.myartsonline.com/how_to_set_garage_door_opener_in_bmw_328i.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/silicone_gel_sheets_for_scars_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/ziwenuzekexifafenubop.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/ctet_form_ka_last_date_kab_hai.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/white_tiger_2012_movie_review.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/replacement_window_installation_guide.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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 4932 bytes
SHA-256: b9cc9b9039d799484e29d384a843d3ea12e004ae126dceaecdbe0653e082ebaf
font_01_sfnt_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 10392 bytes
SHA-256: 706bf77ff2e67b3cb1c7089d782e7019170e82b875701374e919ee627930b29c
font_02_sfnt_off000122a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2