Malicious PDF — malware analysis report

Static analysis result for SHA-256 871e71235fff2fc1…

MALICIOUS

PDF

68.7 KB Created: 2021-02-08 07:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 408a9ccec54b620c1c81d6c107ba7d05 SHA-1: a751e1377c2aea58ae35abf10150b77d4a6fd48e SHA-256: 871e71235fff2fc14a6750a0b0f1e0e055230fb787dd84d0011f4a91c3b7a7de
252 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to manipulate search engine results or redirect users to potentially harmful content. The presence of numerous external links, including one pointing to known malicious redirector infrastructure, strongly suggests a malicious intent. While no scripts were extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/aws?utm_term=chatal+band+dj+song++pagalworld In PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/cc183aa4.pdfIn PDF document text
    • https://turarizamagux.weebly.com/uploads/1/3/1/4/131453837/68a4679ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/vikafaselida/ajgjjic/muxud.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Z3r93Ap/marble_racing_2020_schedule.pdfIn PDF document text
    • https://mawakizuk.weebly.com/uploads/1/3/0/7/130775730/begumuwowom_pujalupajaz.pdfIn PDF document text
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/7945156.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/brain_surfing_2_level_93_beautiful_necklacezamil.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/hi3hdcS/toon_blast_hack_android_download.pdfIn PDF document text
    • https://lidutefavova.weebly.com/uploads/1/3/4/0/134012516/nulagowomoje-nifatipup-palevuwib.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/a5hjogg/black_deck_card_battle_g_gamehack.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/vidadaviwal/antithrombin_deficiency_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/8707286868.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_off0000d040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD040 5436 bytes
SHA-256: 24e71661a398df73f9b3bdf2d263f7443b233fc84fec67969a213b2e2d33a06d
font_01_sfnt_off0000e2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BA 10364 bytes
SHA-256: b028c7f6b9ada70d6b6e12a7d7ca71081e433dad2dc9dda25e0b94e3c7838c7b

Open this report in the interactive analyzer, or submit your own file for analysis.