Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56356e9c1cd0c7b…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 23:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6292b7677c50e2df23f1c6c36d9ea524 SHA-1: dba04ad93242c54c5f380ca04a1f85362ce5bc37 SHA-256: e56356e9c1cd0c7bfb69725c7d10a4c348781239e0a8b17b7b90c7631c7db772
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically identified as a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it's the primary vector for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/award?keyword=list+of+engineering+colleges+in+bangalore+rank+wise+pdf
    • http://zugapuvu.mywebcommunity.org/1612701822.pdf
    • https://cdn.sqhk.co/fapetemiji/fhhhigg/pokemon_home_switch.pdf
    • https://cdn.sqhk.co/loxexafetivu/anpllxT/family_chantel_winter_surgery.pdf
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/xekevukasixapabije.pdf
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/wasibolijul.pdf
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/nodolenonaka.pdf
    • http://madoxorijegobe.sportsontheweb.net/maus_implement_co.pdf
    • https://cdn.sqhk.co/rutesawir/XSjfohi/picsart_photo_studio_apk_for_pc_free_download.pdf
    • http://ruvinowuge.scienceontheweb.net/16678907439.pdf
    • http://lirinevewafa.mypressonline.com/ibm_selectric_repair_near_me.pdf
    • https://cdn.sqhk.co/podiwilur/hjjbNgj/4521113417.pdf
    • https://cdn.sqhk.co/kiribikiv/ghj7gjY/pocket_road_trip_car_list.pdf
    • https://mujebaroso.weebly.com/uploads/1/3/4/1/134131407/baab6791e687.pdf
    • http://kujamemapevubu.mypressonline.com/92591844894.pdf
    • http://tipofeliluget.medianewsonline.com/95137258250.pdf
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/544838.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_0d0df7768b4e496bbbb68cc571cb263c.pdf?index=true
    • http://kijonag.onlinewebshop.net/functional_programming_paradigm.pdf
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_6f27f3a98acc446f9c61bae7856b5f7c.pdf?index=true
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_2e9cffbf470d4b6790f518b01daa3886.pdf?index=true
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_71ab901011564c3eac8aec25497029c9.pdf?index=true
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_3cfea4eb924d4920b5ec125d33fbfac5.pdf?index=true
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_54e4aae291ec4e1391085a8dbe926793.pdf?index=true
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_d660de43bdfa477f9936439d883f0df4.pdf?index=true
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_7eb9978a41b743aa88ca0fd6fbd65197.pdf?index=true
    • 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_off0000f0a5.bin
ec9349a4e3cc61aaf2964afbe6b88caa77fb4b7b6992e987b982a9509634d0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 5560 bytes
font_01_sfnt_off000103b5.bin
ff31118e1bd864f7bfdcbe601f976363e0bc633cc1d353162f6ad5b9ed2eda6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B5 11252 bytes

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