Malicious PDF — malware analysis report

Static analysis result for SHA-256 709d99912cfce5ff…

MALICIOUS

PDF

99.0 KB Created: 2021-03-22 06:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d93e9f463987456476e38d2d8203e44e SHA-1: 23b5e1dded3167eac4b66d22ba680e5034299b14 SHA-256: 709d99912cfce5ff286265a37e43bc9675b11f24551e62df0f35b818479c0d3d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing or malware distribution attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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-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://golowaki.ru/wix?keyword=actually+additions+manual
    • https://pimefukidipobe.weebly.com/uploads/1/3/4/0/134096137/c6590a9f1362.pdf
    • http://matawobedopikam.mywebcommunity.org/criteri_di_tresca_e_von_mises.pdf
    • http://ganedoxumizaj.sportsontheweb.net/52125143051.pdf
    • https://jenazikefu.weebly.com/uploads/1/3/4/0/134017187/6727134.pdf
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/mojotalug_sowij_norox_bidisarapopax.pdf
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/vevawivukuzawulugasi.pdf
    • https://cdn.sqhk.co/tokarikadez/ibii0F2/best_hidden_voice_recorder_app_for_iphone.pdf
    • http://dogalijun.scienceontheweb.net/electrostatic_boundary_value_problems.pdf
    • http://qwertyujg.xyz/samsung_dishwasher_installation_videoi6meu.pdf
    • https://cdn.sqhk.co/letojeka/javWwVE/degisofedewutimufu.pdf
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/6656099.pdf
    • https://cdn.sqhk.co/zivuronufepu/gcghtja/rankle_meaning_antonym.pdf
    • https://cdn.sqhk.co/fudamozomeb/cififhj/charm_king_update_not_working.pdf
    • http://fijeveg.iblogger.org/bitcoin_generator_hack_tool.pdf
    • http://rixorevu.getenjoyment.net/s2_netbox_default_login.pdf
    • http://raftgjgr.space/goxasudunigofijivovewobonesvt1.pdf
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/959189.pdf
    • https://cdn.sqhk.co/molofagaji/aqkwQjh/total_war_warhammer_2_steps_of_isha.pdf
    • http://xixesudu.22web.org/45647227782.pdf
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/1225331.pdf
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/a5e9311169.pdf
    • http://car-test.pro/ejemplo_de_dictamen_limpio68k9x.pdf
    • http://voztrans.ru/haas_machinists_cnc_reference_guide2dy0y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dufowuburaji.rf.gd/which_garmin_watch_is_best_for_runners.pdf
    • http://luwezotefu.rf.gd/takaxefudiroxajofeleg.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd62.bin
d62efdf726665f4df61d98a74fa292905d3c83df0f32acf7aff595ec4da3231f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 16360 bytes
font_01_sfnt_off00013240.bin
50a5d731032ae8cb052aaf14459cdc00ffd98a73b054b1ebf1111fd66f30846c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13240 5080 bytes
font_02_sfnt_off00014381.bin
78ddfcbd3497194cd97c873cf0b25ec77e90e7f91f78c56da9b13792119f9d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14381 10780 bytes
font_03_sfnt_off00016898.bin
87458ef086a81b82a48d413e1e19a06f9a577d0484930b5cc6d101a9b9311883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16898 16176 bytes

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