Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2abf6f263d7244…

MALICIOUS

PDF

77.4 KB Created: 2021-04-22 08:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 61809934045ffd505c27edc10fbd138d SHA-1: e489176ccc67a34e486ef28ac3f9af2c8e0b346a SHA-256: fc2abf6f263d72446adccd043d3866103a2350c43c46f18531fcfa65b1bdee08
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a phishing or scam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site for further exploitation or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/strik?utm_term=human+resource+management+ppt+in+hindi PDF link annotation
    • https://cdn.sqhk.co/sotatixorawi/hc26AeI/sticker_studio_wastickerapps._com.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5ffffcbb76bd6.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/xuxazadat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_602f18b97a7a4.pdfIn PDF document text
    • https://vatanivirasuta.weebly.com/uploads/1/3/5/3/135387760/wirebubomuvame-pulipaban-nogotuvig.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/926107.pdfIn PDF document text
    • http://katipef.medianewsonline.com/73234946499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_604cfc2a31be7.pdfIn PDF document text
    • https://nasabera.weebly.com/uploads/1/3/4/4/134447265/rudowivasuziwara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_60502f6912ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdfIn PDF document text
    • http://rowaxuxot.22web.org/ziwudetibetosisexufawifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lojubefogugiku.onlinewebshop.net/77318984424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/448f3ee8-d391-4a40-87dc-ba2e4a0d9f42/bruce_lee_quotes_inspirational.pdfIn PDF document text
    • http://kageditivumimor.onlinewebshop.net/endosperm_types.pdfIn PDF document text
    • http://jibavuxi.rf.gd/download_bnf_75.pdfIn PDF document text
    • http://kigokigaruv.myartsonline.com/archival_research.pdfIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/social_security_administration_act_1999.pdfIn PDF document text
    • http://bijalefopate.rf.gd/306617997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c69cf6-3f02-4284-bb8d-168aa3b95907/when_to_buy_bollinger_bands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60059d2e-de52-4d86-9155-4a1682a57a3d/47318871673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d90d83-bc9e-4c86-99b1-6b961976e0c0/food_list_for_dash_diet_phase_1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 5300 bytes
SHA-256: a4250e62996ed604a176952f84026b9c03bdca5872fbd9d58db43b629f7d48eb
font_01_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 10332 bytes
SHA-256: 96e0accd1eefcf8465e3c2e98826283087a60fd53c7d5a75dc8928f07853da73
font_02_sfnt_off00011a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333