Malicious PDF — malware analysis report

Static analysis result for SHA-256 b091e0f53b6f4e98…

MALICIOUS

PDF

74.9 KB Created: 2021-03-14 20:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 58ba3e6df252d43dc8f9a9dfa3462713 SHA-1: 54d7b9abda7f4aa3be1a03f03400e3a381d5dc02 SHA-256: b091e0f53b6f4e986fd84028e4b36dd48e9b4382615cc942f51584a8fa12624c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and extensive link farm heuristics point towards an attempt to redirect users to malicious content, likely leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=petsafe+training+collar+manual PDF link annotation
    • https://cdn.sqhk.co/pulovafafita/Jhjijib/gasumejalogur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5ffbb2ae51012.pdfIn PDF document text
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/momesajexuze.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/lizevitopetekoxikedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_600ed2014fcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fd646fd403f7.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/XiJLrym/kulavunafak.pdfIn PDF document text
    • https://pojalurerisufi.weebly.com/uploads/1/3/4/1/134109142/kexewowar.pdfIn PDF document text
    • https://cdn.sqhk.co/wezokobuli/jghfChg/bhojpuri_gana_2019_ka_mp4_ing_dj.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/othhihN/adding_decimals_worksheet_grade_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_6015d492ee9e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_60209a7f42dc1.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/hjT9Gjg/31813551520.pdfIn PDF document text
    • https://fiwirozubaxezu.weebly.com/uploads/1/3/4/6/134659856/c63b34f0918429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_602159eea1af9.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/ZIZhdgi/36523966446.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/39jNhx3/kazuviremexobur.pdfIn PDF document text
    • https://lifofokir.weebly.com/uploads/1/3/1/6/131607054/4986845.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/regonedesebuzajulasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwurekatexo.atwebpages.com/gifurer.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_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 5204 bytes
SHA-256: 6804f58cecf452919155b92cc76c43cc6c7d64afad8a85dc11a14d08c2c485cf
font_01_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 11004 bytes
SHA-256: 57ac9ce087e70b3fb84a5f888c283e20eb39a94f00c3a2a3b16f60f5b625e020

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