Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56ce9d7f7059795…

MALICIOUS

PDF

79.4 KB Created: 2021-03-03 11:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80f341391ab0c93820e39da6f0135987 SHA-1: ebc432c3d544c6ba69c5a971e5bbb2115eb8cb7e SHA-256: c56ce9d7f70597959ba797b11f43938009e9ab5847e6f111a4ee74d734295010
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 0.9998

Heuristics 5

  • 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 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://fokemale.ru/wix?keyword=hunger+games+questions+and+answers+chapter+1 PDF link annotation
    • http://bit-ipo.ru/bellevue_prague_guide_michelinyokym.pdfIn PDF document text
    • http://befigter.xyz/dapurulrd2.pdfIn PDF document text
    • https://relotevifinedu.weebly.com/uploads/1/3/2/6/132683264/89d150e656cf.pdfIn PDF document text
    • http://1fps.ru/rorivenemikikoql4lj.pdfIn PDF document text
    • http://idealica-italiaoficial.site/organizational_chart_template_macmpska.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hfAB8hh/92223932651.pdfIn PDF document text
    • http://kuvofejom.iblogger.org/nafaxit.pdfIn PDF document text
    • http://edarudost.online/hunter_s_star_quilt_patternjbf8n.pdfIn PDF document text
    • http://boothattendant.com/the_unwanteds_quests_book_409qgg.pdfIn PDF document text
    • https://kidodizaramaba.weebly.com/uploads/1/3/4/0/134096495/4218896.pdfIn PDF document text
    • http://gaxazoxisis.22web.org/char_broil_tru_infrared_electric_grill_reviews.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/wawozevuvamekutimoda.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/Ajahcgd/xejebumifabemisavupetoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosigugul.epizy.com/katarina_build_guide.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/52276668732.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 5688 bytes
SHA-256: a89508d8611ded7725dde697f64f25bf37c5d188da4d7045003bb6df50efcfb0
font_01_sfnt_off00010c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C41 10596 bytes
SHA-256: 2ccfa715b60e4f26fecff4e4a904435e2ebb202fa1eb6e514b7e0c4b4956aa24

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