Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddce4252ac2c4453…

MALICIOUS

PDF

79.7 KB Created: 2021-03-13 15:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2989307925fc4ab84794005f6b6cd3a SHA-1: 747d708a8192d65ae0cc472a1b39a687018d5f06 SHA-256: ddce4252ac2c4453988c3ae4ce8209055faf81b550df1e6d17a79a0d5da680c6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and potentially phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious or deceptive content, likely as part of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=non+biodegradable+polymers+pdf
    • http://lololoj.sportsontheweb.net/abramelin_new_translation.pdf
    • https://vunidiripoga.weebly.com/uploads/1/3/1/4/131453449/a8e8d26b33b51a7.pdf
    • http://bagawixaj.mywebcommunity.org/about_myself_speech.pdf
    • https://cdn-cms.f-static.net/uploads/4475847/normal_604b1b34d9c60.pdf
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5ff67a8c17b72.pdf
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5ff5639b3dc5f.pdf
    • https://pokeboxut.weebly.com/uploads/1/3/1/4/131437348/regodut.pdf
    • http://pazadixokumox.sportsontheweb.net/40074497298.pdf
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/6ecb9ebab94218.pdf
    • https://bupogoduvokog.weebly.com/uploads/1/3/4/6/134690502/3630580.pdf
    • https://static.s123-cdn-static.com/uploads/4489969/normal_6005566aeac9b.pdf
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/wefakaxorebakageg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/43296397-5221-413c-a5a4-a69c28a0b2b4/oracle_sql_plus_12c_download.pdf
    • https://uploads.strikinglycdn.com/files/321ecd50-ea73-4757-8f36-69b7d1ef35e1/60967577945.pdf
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_924c1b199a684335a7241c25b94ad975.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f88a993d-4986-4f8d-a15c-e2dbb3ab4376/29847044495.pdf
    • https://uploads.strikinglycdn.com/files/aff04fb6-af53-45d3-bca4-cdf4d46d622e/wumimetimujitelibijenuxi.pdf
    • http://gevapugono.atwebpages.com/how_to_read_love_line_on_palm.pdf
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_3a12ef8a6b7d401fa631d3cf21e4defe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/650a3698-c6a0-4397-9f11-b86a8352ada1/sat_test_preparation_classes_near_me.pdf
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_7942dc158bc9478d8b659e940d41bbbd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ffaee07-b102-47ee-8737-9c52df2dae2a/whats_the_ugliest_sea_creature.pdf
    • https://uploads.strikinglycdn.com/files/dda7edbe-5408-4b27-94f6-907e3a81bc7c/numodesegejunexofuwusu.pdf
    • https://uploads.strikinglycdn.com/files/3f680a25-826f-4ca9-b92c-4bf6bdb715df/fezadonup.pdf
    • https://uploads.strikinglycdn.com/files/ae741fb5-a008-4de0-bc1c-925cf493f9af/harry_potter_y_el_orden_del_fenix_audiolibro.pdf
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_9a31df91e2754f2491dcebe98b054989.pdf?index=true
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_9a6d4e57a5c843eb9d862603085edacc.pdf?index=true
    • http://dirulibas.onlinewebshop.net/41798639293.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_off0000fa04.bin
44eb4d45bc21e2735ec8dcd176250c619afbfe3e047e2ce4717073b52c55780c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 5572 bytes
font_01_sfnt_off00010cea.bin
4fb6c9f9af09ee1e8a18a4ea06aea0b6e5e4071177fb7c3daa7c43e68fe6e687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 10872 bytes

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