Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b11bb45aade7152…

MALICIOUS

PDF

77.2 KB Created: 2021-06-09 14:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c77321e027006ea128ca670b6934271 SHA-1: 5a2654ae03d9e367d90d4115e5ffe393f4c64f87 SHA-256: 7b11bb45aade7152ffab5be11d25e3a409291724c3f4c83b6c3a576679d8acf4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a lure to a malicious site. The PDF's structure and the presence of embedded links indicate it functions as a link farm, likely intended to redirect users to a malicious destination. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://baarspo.ru/123?utm_term=animals+full+movies PDF link annotation
    • https://nujodobenume.weebly.com/uploads/1/3/4/4/134441993/wopirewojovafoxiv.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/wajarifuluruxut.pdfIn PDF document text
    • https://gavititexufo.weebly.com/uploads/1/3/3/9/133997787/pebuvuteni_tufaxogix.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/8024a1b07f373.pdfIn PDF document text
    • https://ladolijid.weebly.com/uploads/1/3/2/8/132816107/6b26c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefimemovem.pbworks.com/w/file/fetch/144603540/71999466436.pdfIn PDF document text
    • http://xetuduju.pbworks.com/f/vomedowukige.pdfIn PDF document text
    • http://fowobok.pbworks.com/f/sample_ethnographic_research_paper.pdfIn PDF document text
    • http://bevosox.pbworks.com/f/julubimupura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15504c38-5ad6-4932-9392-8bff7bc3e341/forex_trading_uk_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60845303-abb5-44dc-ba77-f624b36ace61/mr_coffee_10_cup_thermal_cleaning_instructions.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/w/file/fetch/144629865/77257120672.pdfIn PDF document text
    • http://gedelageke.pbworks.com/w/file/fetch/144890622/download_after_effects_cc_2015_full_crack.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/39263236131.pdfIn PDF document text
    • http://gupiguna.pbworks.com/f/tuwusotudemazopiwa.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144785010/43365127171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90439b2-a1f7-408c-b1d4-93c3cdf7c125/usmle_step_1_practice_questions_free.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/w/file/fetch/144585258/avent_bottle_warmer_chart.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/f/8592319652.pdfIn PDF document text
    • http://fibonilavi.pbworks.com/w/file/fetch/144931950/50344495949.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144711504/26415282829.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 4868 bytes
SHA-256: f952aedf568d1cb5f6fd4ddbd2aff834fb207262e4ee64e3be48ca9e12feda00
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 11652 bytes
SHA-256: aeb86538a9a18264dbd3f3c5c2ae8722a4bb1c46b98c40641e294765de2d4315

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