Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd744376c2b83eca…

MALICIOUS

PDF

85.1 KB Created: 2021-03-09 13:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 899232ef07246de013e0081ea09872c6 SHA-1: 70f7a85e1415a56ea867702c09d881c1c298e487 SHA-256: dd744376c2b83ecad28b60a868aca895a5f5843b23096940d575fc282e431144
126 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML and ClamAV, indicating it's a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or phish for information. The document body, though heavily obfuscated, contains keywords related to car manuals, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=alfa+romeo+giulietta+2020+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/tatidukigag/jhspN95/life_is_strange_game_review.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/daFvrgj/battle_chasers_nightwar_switch_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/fHhjDcu/fomukurunuzatupod.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/ihJ7Djf/fruit_master_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/zdji6MR/depoxazivesukifa.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/whhAWhg/leatherface_dbd_perks.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/descargar_musica_de_antony_santos_mix.pdfIn PDF document text
    • http://saletipaja.22web.org/jomidanito.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/hhnNvij/meberagomu.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/ehbhirF/song_lyrics_quiz_2018.pdfIn PDF document text
    • http://filajupixi.iblogger.org/68217024674.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/HhcQvy3/bad_piggies_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sawuliwinupunud.epizy.com/area_of_a_sector_practice_worksheet_answers.pdfIn PDF document text
    • http://pasifowon.atwebpages.com/xusomud.pdfIn PDF document text
    • http://kulisiwodomewa.epizy.com/99421392351.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/53751041606.pdfIn PDF document text
    • http://rupufak.epizy.com/10957519472.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C3 5448 bytes
SHA-256: 70d36c60e246d98cd9a6c6c7f511423d3a860abfba3a1a22c5419388259d26e4
font_01_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 10212 bytes
SHA-256: 11f5bdae1562331c1b7233cc7b8705d08de2b08396a2c5d80c84b07df5079688

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