Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0dc6b75eb2bf51…

MALICIOUS

PDF

68.8 KB Created: 2021-03-09 10:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1212b623786adc542a8d54127a87f7 SHA-1: 7310258caf70104f4d9fea068e3ae571d7bb81eb SHA-256: ce0dc6b75eb2bf51f1deec8082fac779f33659cc77e9a383e55d8f61a6dbc4a0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting an attempt to direct users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=acls+manual+2015+pdf
    • http://kikifikoxije.mypressonline.com/achyutashtakam_in_tamil.pdf
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/zimajazodo.pdf
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/2323314.pdf
    • https://cdn.sqhk.co/rovifatira/fXQjbC8/life_after_death_according_to_the_bible.pdf
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/1742079.pdf
    • https://cdn.sqhk.co/furafurume/jFhehj3/the_walking_dead_season_2_important_choices.pdf
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/fedisila_sefajaj.pdf
    • https://cdn.sqhk.co/lerutefo/VHljbii/pet_stories_blast_puzzles_games.pdf
    • https://sidunijutama.weebly.com/uploads/1/3/1/1/131163786/3505326.pdf
    • http://dorulezebum.sportsontheweb.net/how_did_the_maze_runner_1_end.pdf
    • https://tilapenudulaw.weebly.com/uploads/1/3/1/6/131607943/gawana_mererufewil.pdf
    • https://cdn.sqhk.co/toliximozupa/ha0jegf/direzelinanuxutijanomow.pdf
    • https://cdn.sqhk.co/vedimurami/M8vhhO8/tiny_bubbles_original_singer.pdf
    • https://rediwugozuza.weebly.com/uploads/1/3/1/4/131438197/d54c38a0cc49.pdf
    • https://cdn.sqhk.co/vivepovugeli/hhmhdgh/15867830359.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuwutexo.onlinewebshop.net/braun_electric_shaver_series_9_9290cc_best_buy.pdf
    • http://mewabetowa.myartsonline.com/how_to_properly_put_on_a_car_decal.pdf
    • https://uploads.strikinglycdn.com/files/fa9e9ece-5128-4dcd-a540-0ea118d51e1e/are_the_harry_potter_books_free_on_kindle.pdf
    • https://uploads.strikinglycdn.com/files/010f22a3-3673-4e13-b65f-d75cba0a3c7c/27452128519.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_off0000cf94.bin
a66528bb67898da2af6d6e9d4cf10738ecfa8138b82e7e174f583672c231edba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF94 5644 bytes
font_01_sfnt_off0000e2c7.bin
255ac680e659cdf6bbcd59bb0f9552cf94201a73d7da3bcb88057ad80d228424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 10360 bytes

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