Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccd85ccc2beae7b…

MALICIOUS

PDF

98.6 KB Created: 2021-03-15 02:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2aa2fc5e49508d9d37fe409ac82c51c8 SHA-1: 7250c19a24d1fc5cccf2e84273ff2a8a692a3fd8 SHA-256: 8ccd85ccc2beae7b189f88a2686177714e20890e09ca10ec3932fd5e18a7dbd5
126 Risk Score

Malware Insights

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

The PDF file is classified as malicious by ML and ClamAV, and contains numerous external URIs, many of which point to disposable hosting. The document body, though heavily obfuscated, contains text related to a game guide, likely a lure. The primary malicious URL identified is https://botokaw.ru/wix?keyword=fallout+3+goty+perk+guide, which is likely used for phishing.

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://botokaw.ru/wix?keyword=fallout+3+goty+perk+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5ffa2a83c1fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454289/normal_6048170e38950.pdfIn PDF document text
    • http://getchambre.xyz/94371254010jfcz1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401555/normal_5fe1c20ef419f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_604b3f9dc96d1.pdfIn PDF document text
    • http://o-karte-kopilka.com/colorectal_cancer_screening_guidelines_canada7d8s5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_600659a226fe3.pdfIn PDF document text
    • http://scoretdho.best/966622809289nc8f.pdfIn PDF document text
    • http://rcasino.info/40235759697yv6ri.pdfIn PDF document text
    • http://honey-love.ru/where_to_donate_old_toys1rmh2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_601e8e7b88eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_600b4fa12dfa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497658/normal_60407c25c101d.pdfIn PDF document text
    • http://homebig.space/85681298670u81h5.pdfIn PDF document text
    • http://winoorama.website/pikimusiveborilepoh9615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_604cfe0fbcd9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_6023c7bda18b4.pdfIn PDF document text
    • http://bu-markett.com/prayer_for_a_peaceful_death_hindu4c0cu.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/patilawasu/machine_learning_algorithms_sentiment_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/blue_card_renewal_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC0 5232 bytes
SHA-256: ccba707afa79c7983d649d523f03cddab730a3c1e5b080c611b64673e02d39fd
font_01_sfnt_off00013db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB1 13112 bytes
SHA-256: 19ab355c6d38dcde0971c25b336141fc3297fef13b59bf754d28ef3e2ea67487
font_02_sfnt_off00016772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16772 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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