Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fd2593eb7be606…

MALICIOUS

PDF

85.7 KB Created: 2021-03-24 04:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a81ad9bb2580db420486949d9b895f83 SHA-1: e66de2ed4ae46e1a1a586ea92c1d7c3ac7b7de76 SHA-256: 75fd2593eb7be606830e914270e88903766ade4f8f3cce6b61d88f68cb3e24e0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though truncated, suggests a lure related to an 'answer key', which is a common tactic for phishing or directing users to malicious sites. The presence of multiple unknown URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=ions+worksheet+answer+key
    • http://tells.fun/tojipuvumiselujujitizadaupm9q.pdf
    • http://zdorovie-vashe-vse.xyz/what_is_the_best_time_for_squid_fishingq05h9.pdf
    • https://cdn.sqhk.co/movozuba/5VLMUjb/54090033478.pdf
    • https://cdn.sqhk.co/lowixadoges/esiiIgc/company_of_heroes_movie_trailer.pdf
    • http://pokupka.space/how_to_trade_cfd_on_saxo90af0.pdf
    • http://nigavereke.mygamesonline.org/27519812510.pdf
    • http://vixabaj.scienceontheweb.net/55373163135.pdf
    • http://dontbeshy.xyz/2015_ncaa_division_2_football_stats077th.pdf
    • https://cdn-cms.f-static.net/uploads/4486535/normal_60446661db671.pdf
    • https://cdn.sqhk.co/ruvonusebex/ggBghhj/98912192590.pdf
    • https://cdn.sqhk.co/feripamapuv/kfR1aMG/dawn_of_the_robots_reading_answers.pdf
    • http://rat-red.space/zobanilapuborsxr49.pdf
    • https://cdn.sqhk.co/xagaxubibiz/eaJjhcu/idle_death_knight_codes.pdf
    • http://liwexun.mywebcommunity.org/sixikolepufutoso.pdf
    • http://vladmer.ru/is_wall_street_journal_free_for_students11593.pdf
    • http://gmetry.online/89131436146noxfy.pdf
    • https://static.s123-cdn-static.com/uploads/4460706/normal_5ffad8b560979.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_e732a07fd432467ca424ad91140eb70d.pdf?index=true
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_f1f0eeaf5fde4654af22476a1156ec5a.pdf?index=true
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_01f729f42b4940a4bdc2e7d877fdc40b.pdf?index=true
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_279cfee730814e498f7a7096c2e71a49.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe12.bin
f80425b2fa7c34674e62d1546223881c5c5ef0b307e00dc11c09fe6aeccc0099		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 4936 bytes
font_01_sfnt_off00010eed.bin
969a1d22b1ebd3732b64fcd5763a1dec5584e52269d500fa76cb6a605214180e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 10832 bytes
font_02_sfnt_off00013421.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13421 16204 bytes

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