Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc556a001a7e2d2…

MALICIOUS

PDF

70.6 KB Created: 2021-04-03 12:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad047a6558e15bee642aa9ef929658d SHA-1: 815121fdb46ed2109766186bec7d947b86fa8fc0 SHA-256: ecc556a001a7e2d20c0d0f134b5893e05e1051da956eff2e6234fdbe7dff0b47
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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 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://jumiwimov.ru/strik?utm_term=myles+munroe+books+on+marriage+pdf
    • https://cdn.sqhk.co/fezifenax/hgQibaM/board_games_monopoly_online_free.pdf
    • https://mawoluzapulumar.weebly.com/uploads/1/3/6/0/136082117/rulugudesozelu.pdf
    • https://tebudewuve.weebly.com/uploads/1/3/2/6/132683230/20a82241aa0d9bf.pdf
    • http://zogometemo.sportsontheweb.net/dalewavexijolutiromiredok.pdf
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/5821458.pdf
    • http://jawazapefaxuzit.mywebcommunity.org/arthrobotrys_oligospora.pdf
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/xiwezeseki.pdf
    • http://tarekupi.scienceontheweb.net/ripufolepibozojavava.pdf
    • http://wojesukuzak.mygamesonline.org/book_of_mormon_conductor_score.pdf
    • https://cdn.sqhk.co/vijamabaf/hhhWbeg/stick_run_hack_version_game.pdf
    • https://kaxupigokib.weebly.com/uploads/1/3/5/3/135324743/wusibowaviwom.pdf
    • https://lefaxujil.weebly.com/uploads/1/3/0/7/130739779/jadimuvevaxa-ganedaji-salojetize.pdf
    • https://xebanodax.weebly.com/uploads/1/3/5/3/135382800/4380513.pdf
    • https://cdn.sqhk.co/fiduzosi/jdsKCNo/fall_guys_ultimate_knockout_mobile_tap_tap.pdf
    • https://fumumakol.weebly.com/uploads/1/3/4/0/134017799/xamijegotisasugo.pdf
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdf
    • http://dekiweragaf.mywebcommunity.org/how_do_you_properly_throw_a_dart.pdf
    • http://luloxijemise.medianewsonline.com/54016428814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3b7abcf3-762f-4d2e-a38a-bf0fe8a6e3ca/samsung_galaxy_s4_manual_user_guide.pdf
    • http://mozaninukokefef.onlinewebshop.net/journal_article_example.pdf
    • https://uploads.strikinglycdn.com/files/8980a784-4326-4c08-af46-592c9dc249ac/xatolanajupot.pdf
    • http://pedirite.onlinewebshop.net/digemadij.pdf
    • https://uploads.strikinglycdn.com/files/fe47b365-df05-42ef-ae63-78b15b2a2a71/pojanaxavaloxamivogokox.pdf
    • https://uploads.strikinglycdn.com/files/b63ddd96-b050-4b78-b682-43d4b0763f8e/apc_back-up_500va_bx500ci.pdf
    • https://uploads.strikinglycdn.com/files/dbff5bc0-982a-4208-9016-1b07bbbe1e32/the_pillars_of_the_earth_movie_watch_online.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5dc.bin
b8760709d8e210476daae14464a7e4eb1e89edd3a47daea0d0e94aad85aee45c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DC 5672 bytes
font_01_sfnt_off0000e923.bin
bf86230f2ef4d4ae926bd53b259a7b6f4b369b66fbec7b85e7c00cfe6b88a37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 10340 bytes

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