Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbddc6ec304c09a…

MALICIOUS

PDF

78.6 KB Created: 2021-03-03 05:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: acf578c1299b8b97a69dbb10c1b73b5b SHA-1: e0a61117410bfaf57116abeb5de6a158bb94de20 SHA-256: ebbddc6ec304c09a31557fba02de8ecf4b5ec588bb125953fa3d639a15f04257
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF file contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The heuristic 'SE_INVOICE_LURE' indicates the document attempts to impersonate an invoice or payment request. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://lozipotod.ru/strik?utm_term=what+is+the+catch+22+in+the+book+catch+22 PDF link annotation
    • http://cheapestshop.xyz/60915245935l4s4l.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/hhghghi/ball_shoot_game_tips.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/bupulowe_vubokobu.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/hcjfhh3/87207047079.pdfIn PDF document text
    • http://stroy-level.ru/wevaregemodetmq4z5.pdfIn PDF document text
    • https://kokezixunilo.weebly.com/uploads/1/3/4/0/134096179/955ab160a2.pdfIn PDF document text
    • https://cdn.sqhk.co/vuluzazogur/chbje9V/batman_the_enemy_within_full_walkthrough.pdfIn PDF document text
    • http://reduslimitalia-official.site/best_prepared_thanksgiving_meals_2020c32xm.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/AoJhcQK/95031013846.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/jjO9uvO/jejozetojuwebetikimenuzog.pdfIn PDF document text
    • https://tebeneka.weebly.com/uploads/1/3/0/8/130874559/lijoluzazusi-telix.pdfIn PDF document text
    • https://noxigizafovezad.weebly.com/uploads/1/3/1/4/131438329/945362ae55ab7e.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/fjf7Jhc/hockey_goalie_training_drills_off_ice.pdfIn PDF document text
    • https://cdn.sqhk.co/mivoteloxip/hctxhe1/fenejigasigu.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
    • https://s3.amazonaws.com/pujirageg/loxetadega.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_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 4896 bytes
SHA-256: 944a19e3e0842ef43e53d681b6ba3b0743c3bbfe4fcf3ccbe94eb11b15e70649
font_01_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 10608 bytes
SHA-256: dd42a152d8931707543698843637ad3418ef3ef8ca3d76befc32a13025c50134
font_02_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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