Malicious PDF — malware analysis report

Static analysis result for SHA-256 707c7cbff4e18364…

MALICIOUS

PDF

73.1 KB Created: 2021-02-17 10:36:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fbba789a3a70d1cad70d5d650224c5dc SHA-1: 8f3875e139b7d23eb6dc60b809fd3f8626cacf11 SHA-256: 707c7cbff4e183641ece7218a70c55a1beb38658b37c4447eedc35933461a525
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://baarspo.ru/strik?utm_term=saeco+aroma+espresso+machine+manual PDF link annotation
    • http://mritzoliver.design/pokemon_kanto_starters_wallpapernnth0.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/agjgthi/mega_jump_doral_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/iirhg01/dobetipuridotifaga.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/fubygRX/73909733460.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5fec66f7d4e1f.pdfIn PDF document text
    • http://shothard.site/45911330722jt53d.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/U8Juhe2/kavizum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498983/normal_5fedd86b62d6e.pdfIn PDF document text
    • http://naturagrush.space/86256733658p473.pdfIn PDF document text
    • http://osummer.space/hashtags_2021_hashtag_generator_for_social_mediakid74.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/Bjeijif/vimimawekikemigolumolere.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/ibQFRkM/94021091863.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/jhhaJif/58701997816.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/gjjcKib/subepotudemowewumewove.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/cgijdhg/72472711410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/what_are_brittle_stars.pdfIn PDF document text
    • http://pawubiba.epizy.com/4154458121.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/solving_consecutive_integer_problems_worksheet.pdfIn PDF document text
    • http://faxumev.epizy.com/hr_performance_appraisal_template.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_off0000e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE135 5276 bytes
SHA-256: f5e1044534b3772d60571e969840a496bdbdd83f5d46658788c6fd722c9385a7
font_01_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 10764 bytes
SHA-256: e9fe9507cb5b5bc581891435e014fe388a3fcf8a73d823ac489107834a37873a

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