Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18e961c4e793a33…

MALICIOUS

PDF

90.3 KB Created: 2021-02-27 15:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 42489d213fd3a1f4958c03437ee36847 SHA-1: de198f82913a22c0cc2632d559cea9d5d134f1f6 SHA-256: f18e961c4e793a335ea6547e0bfe2c4248ec3f7161901106e38f2f998ca348bf
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to 'Wordpress templates for travel bloggers', suggesting a phishing or redirection lure. The presence of external URIs and the overall structure indicate an attempt to redirect the user to a potentially malicious site for further exploitation.

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://fokemale.ru/123?utm_term=wordpress+templates+for+travel+bloggers PDF link annotation
    • http://tufodudem.mypressonline.com/digitech_freqout_review.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/3iijcz9/66125801770.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvuderasaza/4cBieja/79952054004.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/igtjjaY/copperhead_strike_roller_coaster_video.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/jbKjhii/wuserazawupunib.pdfIn PDF document text
    • http://xumegexujarev.22web.org/tidulezaforox.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/hi4rVjj/viking_saga_2_new_world_download.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/ninja_blender_lid_bl660.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/buzaritakevakiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/FQv2Tie/tango_blast_gang_houston.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/1ToifHa/9947756138.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/N8NUohh/modern_soccer_coaching_tactics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mipizaju/jandy_ball_valve_handle.pdfIn PDF document text
    • http://zuraravata.epizy.com/e_h_coriolis_flow_meter.pdfIn PDF document text
    • http://duvodix.myartsonline.com/how_to_reset_the_control_lock_on_a_whirlpool_duet_dryer.pdfIn PDF document text
    • http://nagurinetawami.rf.gd/how_to_replace_battery_in_first_alert_smoke_detector_7010b.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/10618304648.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/gubaxagakigofefij.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/nixotaxatovo.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_off00012543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 5572 bytes
SHA-256: b976bb97547aa87ab7e965af5bd3f44ea6cd8a06320d5a49ca49a07fe90b279b
font_01_sfnt_off00013833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13833 10316 bytes
SHA-256: dae916596fe768191e5b0bf75042ed42242c23bd0a63877b9e01450d9f1bfb5f

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