Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c29a696bc7fba7…

MALICIOUS

PDF

77.1 KB Created: 2021-03-13 17:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66a200c42eba875911107bea1f186b7b SHA-1: 73a3ec790909dac3b04ea85f9b70588324365fd6 SHA-256: 56c29a696bc7fba7f1fc3bce54b8141c98ed02ad20ecbf3c1ace0ac57752df82
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM specifically indicates a large number of external links, suggesting a link farm for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=game+of+thrones+head+of+the+dragon+wiki
    • http://btsworld.org/dukiwezedetodejuxozirgmytk.pdf
    • https://cdn.sqhk.co/nupepewomaxu/jbjcrjc/guess_the_song_lyric_quiz.pdf
    • https://cdn.sqhk.co/kefivaxepaj/hidhegg/sculpture_park_near_me.pdf
    • http://alkim.xyz/the_best_keto_diet_recipes042ve.pdf
    • http://islemleriniz.org/782595139157swo9.pdf
    • https://cdn.sqhk.co/falugojafat/cgdjhgj/throne_of_bloodstone.pdf
    • https://cdn.sqhk.co/wadalibituge/f4hiibA/evil_defenders_apk_full.pdf
    • http://biggymstoe.com/adventure_escape_mysteries_dark_ruins_chapter_9buad3.pdf
    • http://creditpm.com/monuro5631f.pdf
    • https://cdn.sqhk.co/zikufivol/ijj3ijq/wild_west_survival_shooting_game.pdf
    • https://cdn.sqhk.co/xovatagemi/ehchc8M/fitbit_watch_charger.pdf
    • https://cdn.sqhk.co/dutebosatu/Kr1Cmig/township_apartments_redwood_city.pdf
    • https://cdn.sqhk.co/sunawopi/ihiigdh/zombie_defense_2_episodes_apk.pdf
    • https://cdn.sqhk.co/wuvotalek/i1Ijija/highway_rider_bike_racing_game.pdf
    • https://cdn.sqhk.co/nifijagik/hbgdhgO/bovatosurapuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jodabiladezot/shutterstock_editor_free.pdf
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_5e624106fefd4a24a8f49cb2fe4ecb22.pdf?index=true
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_c07b1b8206be44c58ad667869be34f31.pdf?index=true
    • https://s3.amazonaws.com/mexesazaxasa/dixie_narco_501e_live_display_manual.pdf
    • https://s3.amazonaws.com/dazovosugev/paduxiburogibazafasose.pdf
    • https://s3.amazonaws.com/gurafoga/java_jdk_8_mac_os_x.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_off0000ef0c.bin
2ddb0adbd64165b8dccc0f7a790c2183ea45dccfc9c68ca6d8a260f25bbf28f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0C 5476 bytes
font_01_sfnt_off00010199.bin
05966e41fd15b51f4a5cc6ebf7bea029dda8eb817564de39e9a1eb1b04b4b0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 10940 bytes

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