Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c898f3f7e4dfa1…

MALICIOUS

PDF

75.6 KB Created: 2021-03-11 13:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ddc85157abff8381a5b35ab4ad75d127 SHA-1: bea7cc82e6539deb58fed469679f19a59706ff87 SHA-256: e7c898f3f7e4dfa1245ab1e6f0cdc6a2d67e2207a8566d4f56400a50db1e4d8d
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting potentially harmful sites.

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://xezojetit.ru/award?keyword=biology+books+for+high+school+students+pdf PDF link annotation
    • http://znasila.ru/georgetown_university_secondary_school_reporti5igg.pdfIn PDF document text
    • http://digtalcaliper09.xyz/wojuludatubejebuvefgnmhk.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/jjijjiV/xoxetavanixepogivikif.pdfIn PDF document text
    • http://femokotafi.66ghz.com/64648845970.pdfIn PDF document text
    • http://maturibcgj.space/682982889914onm1.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/R1vWbNx/tovinibavutuvotinakanil.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/hihfLge/rovimorosowuzurum.pdfIn PDF document text
    • http://3gusevshop.space/financial_budgetsfwm3h.pdfIn PDF document text
    • http://usecabinets.xyz/247597923633sz5o.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/hgihe5z/kifujoxumagizatapero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb25b05-bdb6-4557-bd4b-121fc86edfd9/navy_training_jet_crash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71e8fdb-fcf5-4485-bd46-afea5a56a71f/gekojan.pdfIn PDF document text
    • http://gonuwufif.epizy.com/preposition_of_direction_worksheet_with_answers.pdfIn PDF document text
    • http://betiger.epizy.com/hematology_analyzer_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680d57e9-ab95-43be-a3e9-e6a2b632e1ef/wizalo.pdfIn PDF document text
    • http://retudazugo.rf.gd/cash_flow_statement_format_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90cd074-b217-4372-89bf-f11cb9aa1508/snapchat_filter_that_makes_dog_look_like_disney_character.pdfIn PDF document text
    • http://vajitefafuxuz.epizy.com/halgi_bajau_kya_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c383bb-90ae-4598-ad36-c6ec18ed966c/dedurekemegiripop.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/casey_at_the_bat_questions_and_answers.pdfIn PDF document text
    • http://buzetewad.rf.gd/how_to_include_character_in_latex.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_off0000e9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 5564 bytes
SHA-256: 0636a3f807e9b7d62b47c92b27848982615b4ba9f26c99e302fe2a12da9a3498
font_01_sfnt_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 10664 bytes
SHA-256: 82574f635b84fa78d52861e3c1df6de8adb109ab64941f7a1297fecb93983b42

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