Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ebf9d08a1958af…

MALICIOUS

PDF

79.8 KB Created: 2021-03-27 11:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 83482a28e29d92a84478f52723a69cde SHA-1: 0510ff062a767efd618c67d3e1c305232ea590ae SHA-256: 58ebf9d08a1958af13a465637a8860b8cc2fe3c3b440ea9b2b0bedff09ea66bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body's content suggests a lure to disguise the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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://soxebez.ru/123?utm_term=businessman+2+telugu+movie++hd PDF link annotation
    • http://rm-swis-mine.com/lowercase_k_worksheeti7qxs.pdfIn PDF document text
    • http://tublitalia.space/86121332044620dr.pdfIn PDF document text
    • http://gnfcns.info/65377538412q893.pdfIn PDF document text
    • http://albatros-trans.ru/79802272427kvlvq.pdfIn PDF document text
    • http://inmyshtangen.xyz/gratis_aplikasi_autocad_201013wfq.pdfIn PDF document text
    • http://design-kvartira.info/homedex_50_recessed_mounted_electric_fireplace_manualnawmv.pdfIn PDF document text
    • http://brumbum2.xyz/343809075696f4qc.pdfIn PDF document text
    • http://baltika-trans.com/ejercicios_de_diagrama_de_arbol_resueltos_para_preparatoria7dgx4.pdfIn PDF document text
    • http://esparks.ru/doraemon_song_video_3gpvrxyb.pdfIn PDF document text
    • http://nickned.me/logos_and_rhemaz9im1.pdfIn PDF document text
    • http://gatorama.fun/frosty_the_snowman_easy_piano_sheet_musicgldea.pdfIn PDF document text
    • http://fakts.design/nixinikizu7m4e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://warunegiluj.rf.gd/durimowezo.pdfIn PDF document text
    • http://sasitegeke.epizy.com/munegerowaviwe.pdfIn PDF document text
    • http://foletakusuwavid.rf.gd/basic_english_words_book.pdfIn PDF document text
    • http://jejivosijej.rf.gd/73805773852.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_595f45038168413d8d2130feece64aa3.pdf?index=trueIn PDF document text
    • http://zenudaxefuk.rf.gd/34473960639.pdfIn PDF document text
    • http://kujinid.rf.gd/manik_2005_bengali_full_movie_free.pdfIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_f2f6f704ce40405b91f7e47f345dd155.pdf?index=trueIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_3ab68258e6344ff78fe4386e17c1e39b.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_54fee16a81c247e2a50e4f8f21f3dfa0.pdf?index=trueIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_a7a27ee1ccd04acf9a139cc1b3198d39.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AC 5384 bytes
SHA-256: c7c2d7c504d3394ab468a904cf18600e3449ecd1de4f1d9fcfaa31a9ba9dbc2b
font_01_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 11356 bytes
SHA-256: 145c8a67452f6103f18b5caa5a14707980655cd71c347cea6751d0988f129448
font_02_sfnt_off00011cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB2 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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