Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c117e72e6c7154…

MALICIOUS

PDF

70.7 KB Created: 2021-03-17 11:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b0a3316ab849a0b29c58b3b228b8f523 SHA-1: 288ad90310459e24224debc445e18f686b5a550e SHA-256: 55c117e72e6c7154975b4c2b695720a9b09db545c1e73eda8d51b8829488568e
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains an external URI and an SEO redirector link pointing to 'https://bologen.ru/wix?keyword=branches+of+earth+science+worksheet+answer+key', suggesting a phishing or scam lure. The document body, though heavily obfuscated, indicates it's related to 'wkhtmltopdf', and the presence of embedded URLs further supports its malicious intent as a downloader or redirector.

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
  • 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://bologen.ru/wix?keyword=branches+of+earth+science+worksheet+answer+key PDF link annotation
    • https://cdn.sqhk.co/dubagojovo/iaicHhb/microsoft_planner_training.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/q9ggcCr/fidget_cube_3d_printer.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hbjbgj7/best_english_grammar_course_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/jfdjhjc/fuxexetuwibigoladati.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/hdhijhP/maxojiduj.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/vilejorivawubivosoxi.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/androgens_and_anabolic_agents.pdfIn PDF document text
    • http://golixudib.mypressonline.com/construction_fire_safety_manager_jobs_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/hgjbjc6/zogugejaferemevek.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/jajfczZ/doweruborif.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/drYheii/44880496480.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/cJWhhhf/iron_maiden_legacy_of_the_beast_tour.pdfIn PDF document text
    • https://cdn.sqhk.co/dowamagova/hiihfhi/nuwuwubaxukafenexitonewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_602af07ef2d3c.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/2iiqmjg/velodyne_lidar_puck_datasheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5fedf2cc48991.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/jitimesolagun/why_is_my_diffuser_blinking.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/sprint_scrum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/33435210857.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/adobe_acrobat_reader_android_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/18649881.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 7

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_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 5244 bytes
SHA-256: e0fcb1c1611b37f3fac955d15ac2eab163a95159a8c815124debf8882521485f
font_01_sfnt_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 9992 bytes
SHA-256: 19f6bc05026a3bd6b903118b8453564943c90d99e1869f73eb3f6f2914a95907

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