Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4bd43859bf824b…

MALICIOUS

PDF

69.5 KB Created: 2021-03-05 12:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: da8601cc947598bf3db545a062c8cdbe SHA-1: dd98fe296ad767f1510ad1d045a48e149ea93afd SHA-256: db4bd43859bf824b1e44cdfcc922cf85556b066f1ac6113c87fb98c37f472228
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=roomba+595+battery PDF link annotation
    • https://cdn.sqhk.co/walumupo/egdpQje/belebafevirumarevasig.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/gvKaR0n/photo_editor_pro_collage_maker_photo_gallery.pdfIn PDF document text
    • http://health2health.online/how_to_write_a_poetry_book_in_wordy4l4m.pdfIn PDF document text
    • http://mihetos.xyz/44002993943ri31o.pdfIn PDF document text
    • http://koxenatez.22web.org/30506505115.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/aib7jdo/archery_go_archery_games_archery.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/a93aAdF/zombie_gun_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/ijggibG/sulovujubunudixozi.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/gie1gcQ/rum_balls_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/fOm1Zhg/running_shoes_near_me_now.pdfIn PDF document text
    • http://rodina38.ru/fear_free_module_4_answers6oh3g.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/sifMjcl/32625051910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/fact_sheet_hand_foot_and_mouth_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/38184864397.pdfIn PDF document text
    • http://sezifusina.epizy.com/tofogexusujopet.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/commando_training_program.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/sojurulolenasolafipoxidi.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/definition_incrementation_informatique.pdfIn PDF document text
    • http://ropobowex.epizy.com/cause_and_effect_diagram_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/literal_meaning_is_defined_as_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/logic_truth_tables_cheat_sheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 5148 bytes
SHA-256: b7806f6b06927a5ca9001c5c15ca9f21d7bf4d8fe5d5ad27868d962b76132908
font_01_sfnt_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 10096 bytes
SHA-256: aa7edd25e5919ab67a6a0e735d5cb869867e3256c4b014c44f37a93971ac2a95

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