Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02eaa295adfbfb…

MALICIOUS

PDF

102.3 KB Created: 2021-04-05 05:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dc16cdffb80f8525f4351b265363ec07 SHA-1: ea9c583e75486b48d5cae1d8195eae3a113fccd8 SHA-256: 5e02eaa295adfbfbcde47ef349d34a878b85457f945a267fe1aaec1eb6eff02e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing. The PDF_URI heuristic identified a URL that appears to be a lure, disguised as a Bible gateway link, which is a common tactic for phishing campaigns. No scripts were extracted, but the overall structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/strik?utm_term=matthew+25+niv+bible+gateway PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413117/normal_604021551471f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_60592f82d5146.pdfIn PDF document text
    • https://cdn.sqhk.co/fafopikej/w6xngjz/5085864051.pdfIn PDF document text
    • http://tixarofisaru.22web.org/85628990124.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/KjaHMhi/cardboard_recycling_omaha.pdfIn PDF document text
    • http://ooovseanalizi.ru/philips_32pfl3506_f7_overscani1wsd.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/six_way_paragraphs3u8sq.pdfIn PDF document text
    • https://cdn.sqhk.co/pokemazikera/jfuheBu/barbour_jacket_fitting_guide.pdfIn PDF document text
    • http://1green.space/my_airtel_video7jnrx.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/gej1T1K/cultist_simulator_rites.pdfIn PDF document text
    • http://gitilapen.66ghz.com/72726532307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_6011fc04e2798.pdfIn PDF document text
    • https://cdn.sqhk.co/pidefatop/Igg5hgk/alien_resurrection_director_s_cut_runtime.pdfIn PDF document text
    • http://comp-arenda.site/381568271605h8t5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_603ecf6f38e0f.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/VXDggjd/24572822194.pdfIn PDF document text
    • http://nefuzixitelu.iblogger.org/frecuencia_cardiaca_perros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_60314661b5d67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://labotiz.rf.gd/cambridge_english_objective_advanced.pdfIn PDF document text
    • http://latananuv.epizy.com/12762507269.pdfIn PDF document text
    • http://tapanowi.epizy.com/fopozuvenunofesogis.pdfIn PDF document text
    • http://rasezufolob.rf.gd/felan.pdfIn PDF document text
    • http://mezezix.rf.gd/71803905195.pdfIn PDF document text
    • http://zomekitutaduvuv.rf.gd/vuseluxowurur.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_off00015299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15299 5328 bytes
SHA-256: eb8c200f2ea99f8424da3f3dee43d830076a9a7b597bba6e6aacf25965bfd602
font_01_sfnt_off000164e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E9 11468 bytes
SHA-256: 5393beb654287399d4c5534e77b01617224a430c074f3d09b4855cf81f035d7c

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