Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a603d6ec70db2ec…

MALICIOUS

PDF

92.4 KB Created: 2021-02-16 05:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b78cd269f7be619f353c7c09b59b793 SHA-1: eca450b31260a4095233700510797f383b20df5f SHA-256: 9a603d6ec70db2ec3b864f7cc075b17130ebbeea403c1fe02b69a166b31b901f
186 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 external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=elite+clue+scroll+guide+osrs PDF link annotation
    • http://bobejitamatu.iblogger.org/islamic_ramadan_calendar_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/giiicCC/zombie_defense_hacked_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/mgggckz/petrolia_isd_athletics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1e30bcf25.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/Dhgifif/ax_3_domaines_neige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5ffe62bde1312.pdfIn PDF document text
    • https://dukiferuxol.weebly.com/uploads/1/3/0/8/130873869/fufiranasazuw.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/2777217.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hgjmu7R/bawubedonabol.pdfIn PDF document text
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/tuwodujozero_mikatakipadura_xevizitidaje_susaro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410418/normal_5ff96511381a4.pdfIn PDF document text
    • https://lepifokofufup.weebly.com/uploads/1/3/4/0/134018260/1efeba626f8.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/835263695e.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/jaghhcz/xerixololew.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/3897484.pdfIn PDF document text
    • https://wejilosadala.weebly.com/uploads/1/3/0/8/130815097/3b6ad.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/2haihVW/amaze_cloud_plugin.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/qW9gdjb/lanosunusareluja.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/v5id1ll/pexogogofij.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/3R8gekh/punugukarodawemasidupex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wesofidufu.rf.gd/14630606618.pdfIn PDF document text
    • http://wuparol.epizy.com/kushala_daora_guide_mhfu.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_off00012f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F70 4856 bytes
SHA-256: 8fa82d0c8955963752b5cd850b9758e4826c1c0d5aed3556e78178e683da018c
font_01_sfnt_off00014005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14005 10504 bytes
SHA-256: fa1b986310f25e6772455e6631eb394af387fbabe149f7194233a5df0d1b3ba3

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