Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66ca551e6e74540…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 22:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9471e795fcf1536326a62992e1c0886d SHA-1: 9da257f05c06a3bdad74bd9a3f7566bf08173088 SHA-256: a66ca551e6e7454064eade2a6ff64058c8fc8806fa62128132367fc708ef8603
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', directing users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the structure and heuristic firings suggest the document is designed to exploit users by redirecting them to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=wagner+power+painter+plus+6.6+troubleshooting
    • http://naturmilans.fun/mystic_forest_live_wallpaper_weatherbehvv.pdf
    • https://cdn.sqhk.co/kixagixupo/P11Eghb/tigosubidijuvimodusatuv.pdf
    • https://cdn.sqhk.co/pixazizaze/egeighd/last_stickman_battle_royale_hack_apk.pdf
    • http://italywow.pro/mounam_pesiyadhe_movie_hd_720p_downloadvrrtr.pdf
    • https://cdn.sqhk.co/fixikumeboga/lwFNIpN/storyline_2_trial_version.pdf
    • https://cdn.sqhk.co/daxegajok/G3hiC4H/space_rpg_3_best_ship.pdf
    • http://copytoshka.ru/xogagixaveloreszmia.pdf
    • https://cdn.sqhk.co/pebekaja/hgiijjh/88102696868.pdf
    • https://cdn.sqhk.co/kojetovukufo/jchjje9/21900118934.pdf
    • http://dronextactical.xyz/nexedenucz1.pdf
    • https://cdn.sqhk.co/duloputemab/gghdvje/powerpoint_template_2019.pdf
    • https://cdn.sqhk.co/naliwanik/MgjeOge/final_fantasy_16_trailer_analysis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_9a1a9945c47840b5b6147e18e7007641.pdf?index=true
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_6c4363379c234b2faf9c9ebc15aceb0b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/583a5294-aa03-495c-b082-fc92072f4555/what_is_the_compound_interest_effect.pdf
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_7d021476fd0f443ead42c0c3148693cf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/03a9e69d-2406-4242-8366-7f0bebc27e68/tajweed_rules_in_english_ppt.pdf
    • https://uploads.strikinglycdn.com/files/42f2fecb-6f34-4d7e-bafe-8a1eb7c932d0/fupelekujesujafowaxoxu.pdf
    • https://s3.amazonaws.com/fusidejebi/sebadosexariduner.pdf
    • https://uploads.strikinglycdn.com/files/9db36f82-4377-4ccf-8908-ca25081e5048/first_alert_smoke_alarm_model_9120b_chirping.pdf
    • https://s3.amazonaws.com/fopalew/apartment_meeting_letter_format.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b2.bin
78c00130a42cd455a695927c356bdee19022580cd4743e4ec5351bf36c6a092d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B2 5512 bytes
font_01_sfnt_off0000f785.bin
445e2d750a4e2ab7493ba91bd313c07015aa9efb01a6f98a8de2d216eebb6828		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 10044 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.