Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4c1835d72c9033…

MALICIOUS

PDF

77.7 KB Created: 2021-02-27 14:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eed5bebd5dd684b65a350b288925bca0 SHA-1: 2661fe051609490e944bfea77adb438c3efae539 SHA-256: fa4c1835d72c9033689fdc135f5140bf15b6ab1425b8f3ef938ce6be1d260c30
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'fokemale.ru', suggesting it's part of a phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to salary information, designed to trick users into clicking malicious links.

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/strik?utm_term=how+much+does+a+public+administrator+earn+in+south+africa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fd0826ecd3ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_6002476eb492e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463009/normal_601b1867ac043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478134/normal_5ffa348e84689.pdfIn PDF document text
    • http://didopikorubozav.iblogger.org/green_day_american_idiot_live_mp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_6037000ae7c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_600b614828634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5fcc231d3de24.pdfIn PDF document text
    • https://pukaxonimuno.weebly.com/uploads/1/3/4/4/134435323/bapomolivojejon.pdfIn PDF document text
    • https://lozuninusagutog.weebly.com/uploads/1/3/5/3/135309735/kirafubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_603071d98f199.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/bA2jjMy/birdy_skinny_love_lyrics_karaoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497697/normal_600a454664d17.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/fhaYzxJ/sas_zombie_assault_tower_defense_hacked_unblocked.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/38913056039.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/iQ4cX9l/luke_combs_hurricane_lyrics_youtube.pdfIn PDF document text
    • https://duzesoduvumasu.weebly.com/uploads/1/3/4/1/134131570/wulirazakasazisosas.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/jhV8Jru/rumble_fish_movie_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 5588 bytes
SHA-256: 5ea5acf0c7de12a884e83197bbd6eef6aa527814abc80abd15740c7fff0beae8
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 10700 bytes
SHA-256: bbb65931d0ff0ca337803901f776d9c26588699a34b545c672cca92ea903da23

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