Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d249be66ca903d…

MALICIOUS

PDF

77.5 KB Created: 2021-03-23 01:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d3a9c8793f515e6af2e884d5efcc612e SHA-1: 57727e434e15498026358e09d9570edb2f8b791e SHA-256: 32d249be66ca903dd6b8689bf195a19c5eb6eb6d5def571a9339944fd29d3bd0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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/aws?utm_term=rv+toilet+seal+lubricant PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460045/normal_5fc641ef82f4f.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/gadufoxodamotodaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5ffe6f2da9ace.pdfIn PDF document text
    • https://bufitalusiwe.weebly.com/uploads/1/3/2/6/132682607/8874263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_6006cbe3cab95.pdfIn PDF document text
    • https://vadizomozizi.weebly.com/uploads/1/3/5/4/135400682/fezazod.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/mYRjfgj/nonstop_knight_offline_idle_rpg_clicker_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_600cf3dcd780d.pdfIn PDF document text
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/kagirovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469386/normal_6017ad3c9b13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_5fd98a1395ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/djahjgo/xibunimirizedime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500669/normal_5fe1efdfa4458.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_fb29dd2e86a64cc7be4dfaac9720a901.pdf?index=trueIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_8dec7e2b12b540cab298bd510e8b326a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/complete_list_of_antonyms_and_synonyms.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/zuvapud.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_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 5000 bytes
SHA-256: f5a9bade468b153ab975a73ba2efb037b40bf17d26bc664b32bc98af8ed09efc
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 10600 bytes
SHA-256: cfbb43f9e0415ea2f43a9a83c69714d80e660f55662e5447cb22303eda00698d

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