Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1177e757acf6cb…

MALICIOUS

PDF

77.0 KB Created: 2021-04-26 20:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2a1987d234a9dfa560b19318ac47468 SHA-1: 25346c610802c2f9e9d6a1d1e10371996332f307 SHA-256: fa1177e757acf6cbef12577ef54dd9309e6952b60dabd73b5385dfc3ce549b2c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of many external URIs suggests the document's primary function is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=new+york+take+5+winners
    • http://nimidarizul.22web.org/34085018074.pdf
    • https://cdn.sqhk.co/miloxuso/jqjbdge/xopivi.pdf
    • https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/c3bdaf001.pdf
    • https://cdn.sqhk.co/bapisolel/8hcGCjf/35184880916.pdf
    • http://noxodexuvalolum.iblogger.org/ciclo_de_vida_de_bemisia_tabaci.pdf
    • https://ponukikoruxa.weebly.com/uploads/1/3/4/3/134343798/nolenojam_puginedow_bivoronugagu_dipojikoxore.pdf
    • https://cdn.sqhk.co/kadeposamo/hge3vih/car_wallpaper_hd_for_pc_4k.pdf
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/7105789.pdf
    • https://cdn.sqhk.co/wuvevalor/aUDjenw/birds_vs_zombies_2_game.pdf
    • https://reralifinopu.weebly.com/uploads/1/3/4/0/134018386/2bb9e593ec7.pdf
    • https://cdn.sqhk.co/bokupajokim/ijyBfe4/hockey_stats_app.pdf
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/ninaxuzorexonuf_dudalas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dowavelaxam/samsung_hw-e450_best_settings.pdf
    • https://s3.amazonaws.com/bisegilupuf/96160875237.pdf
    • http://remakirobiwux.epizy.com/21515016412.pdf
    • http://limirosu.rf.gd/babofipi.pdf
    • https://s3.amazonaws.com/nisiwanolom/android_google_discover_dark_mode.pdf
    • https://s3.amazonaws.com/zomuzigo/xmanager_passive_free.pdf
    • https://s3.amazonaws.com/fulazelof/kutufop.pdf
    • http://putesedesupelo.epizy.com/barsaat_film_all_song.pdf
    • https://s3.amazonaws.com/dejazuvorira/tavabukakijekajevuko.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/human_anatomy_and_physiology_practical_book.pdf
    • https://s3.amazonaws.com/foneniz/debubotezovavagiwuperisa.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_off0000ee39.bin
b64cc78acbafa83928df90d8c94d0c6d564291a8bdf3ad0fda834e3fb5dc2815		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 4996 bytes
font_01_sfnt_off0000ff6c.bin
738bf536618e4749d40b21e01ff1861e62af8449c5bce32b4f2132cadcf0c1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 11036 bytes

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