Malicious PDF — malware analysis report

Static analysis result for SHA-256 5beab200313ba8cd…

MALICIOUS

PDF

76.7 KB Created: 2021-03-30 06:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 55c27337abe8bcf5369a90638a6d0308 SHA-1: bc98e7c63b1a989c777aa7a0eb4ec46befb5b8b4 SHA-256: 5beab200313ba8cd22ea931603b598f24ec695c599427e7eab2f50f954cbc03f
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, including a link farm and a redirector disguised as a free download lure. The primary malicious URL identified is https://ponafet.ru/strik?utm_term=hp+ultraslim+docking+station+audio+not+working, which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a technical support pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/strik?utm_term=hp+ultraslim+docking+station+audio+not+working PDF link annotation
    • https://cdn.sqhk.co/kazamepa/l2KjfGx/super_sling_island_2d_adventure_kong_crazy_junglers.pdfIn PDF document text
    • https://varupeneg.weebly.com/uploads/1/3/0/9/130969993/geterinotalep_vefatuz_voxojakajawi_vusazuniji.pdfIn PDF document text
    • https://cdn.sqhk.co/gawisibiw/jiFVjhs/atarax_generic_name.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/dimidizutoxuko.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/hhkjjD2/telegram_messenger_app_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zadirajuviku/f6haUzo/mekevowus.pdfIn PDF document text
    • https://cdn.sqhk.co/jategesil/qUhj8n1/verarupoderafakepisimeb.pdfIn PDF document text
    • https://jilolepileg.weebly.com/uploads/1/3/1/4/131453494/vitowagixegafil.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/j4jhgh0/52381441795.pdfIn PDF document text
    • https://nezikuwetop.weebly.com/uploads/1/3/5/3/135346993/bobavogufizotoga.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/tazibabebamep/little_mermaid_broadway_score.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/information_about_computer_parts_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e30da6c-6d74-4c79-9f7b-e9ce3aacce3d/32514675804.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/xiziferorobasa.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/72740964945.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/zigif.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/drama_triangle_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b2dd2d-2a07-4419-873f-1a8340e97e8d/47137139002.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/howrah_bridge_photo.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_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 5508 bytes
SHA-256: b1d61806fdf23ef05216716a03d46a24409f30f07c8ef78c525fa821d4b9a0e1
font_01_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 11560 bytes
SHA-256: 46d22a7045d8bed601fe6028c34b2f3be868876540f79ad1255223f4eae9fc06

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