Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db4009750b9b273…

MALICIOUS

PDF

67.9 KB Created: 2021-02-19 05:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dcf677625698c6c63664fd6ee57a8671 SHA-1: 215d4877c67f01873b6f7b722e8ff4cbde76843e SHA-256: 3db4009750b9b273a8d0e07b0b281f9ce1f891aa7ed131ce16721a1ee55a293f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing. The document body, though truncated and partially obfuscated, suggests a lure related to 'Dan Brown Inferno chapter 1 summary', aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=dan+brown+inferno+chapter+1+summary PDF link annotation
    • http://jewlgems.com/60883978778ij6we.pdfIn PDF document text
    • http://extraterrestrials.space/esame_celi_a11nh1m.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/bikulomefog-pajigajujigal-xurez.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/sawidawavux.pdfIn PDF document text
    • http://vermono.site/abc_worksheet_cbthti56.pdfIn PDF document text
    • http://tumbaa.space/composition_of_functions_worksheet_answers_kuta_softwarexd3ia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477635/normal_5fcd825c1a5dc.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/where_is_the_filter_on_my_samsung_top_loader_washing_machineb23ri.pdfIn PDF document text
    • http://legendbilisim.com/689234822162vbd0.pdfIn PDF document text
    • http://wide-take.top/91929989556yq2zk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_6008c3a843232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_60143eddc4e0f.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/5263858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388422/normal_6007faeb696b6.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/savuwigazifodebew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_600ecbfa09895.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/mQCLnhb/pupud.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/bikikanafopavu/hurt_me_once_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/caged_1950_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/rasasozobag.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/23468867793.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_off0000cc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC61 5608 bytes
SHA-256: c5ef6427a1588656cc3f34324057903824f2c2578ecbacdc3355865694fd8030
font_01_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 10260 bytes
SHA-256: 47543e0031c7535460b57df873f97ad0783b1719aafc7a5e8ee80c8b58ba10ae

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