Malicious PDF — malware analysis report

Static analysis result for SHA-256 673615c1ba547f23…

MALICIOUS

PDF

73.2 KB Created: 2021-01-31 02:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ab9bff057e6552ebc90bff7a75da58e8 SHA-1: e115ab8d3e602ecce6fc37c8729ad41779c30002 SHA-256: 673615c1ba547f231a03e2b614a95914371986c50b129304c92d2328e5743e52
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm designed to redirect users. The embedded content, though heavily obfuscated, appears to be related to a Prince of Persia APK download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=prince+of+persia+apk.+weebly.+com PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446500/normal_600a473aa1e98.pdfIn PDF document text
    • http://bilapak.66ghz.com/sikizokixunovetoxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_6004fa7a9c81b.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/tigex.pdfIn PDF document text
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/8988222.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/tusaxafeparexok_baruvekuvoku_dapubabuzogu_radedu.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/sofezigigiginadi.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/9397819.pdfIn PDF document text
    • https://tikoresi.weebly.com/uploads/1/3/0/7/130775690/935bd12ed5b91e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483624/normal_5ff555c07b0e0.pdfIn PDF document text
    • https://merirano.weebly.com/uploads/1/3/2/7/132710628/bebeluzekukiridov.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/sanigig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5ffefa4204aa8.pdfIn PDF document text
    • https://tubababekegoso.weebly.com/uploads/1/3/4/8/134880125/bumud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wepaxilex.epizy.com/85825165557.pdfIn PDF document text
    • http://vuruwabudakase.epizy.com/armed_heist_mod_apk_1._1._19.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/telesaxufukobedupex.pdfIn PDF document text
    • http://gogewafusa.rf.gd/tanaman_gymnospermae.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_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 5592 bytes
SHA-256: 0813dd99e8522706ec6889db95808e4dd7b85f27662462f67a515dbe10e61f7b
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 14616 bytes
SHA-256: e57d9c2500e075aefa6c1c632d53dc92098fba3e3e361c489c3c7f06a9784e89

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