Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a84c31a5e8a004a…

MALICIOUS

PDF

79.2 KB Created: 2021-06-11 01:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16c757b3d5de4214d61a72e005285dde SHA-1: e8b6aaf3106c1499d88b51e687fd03c57737e14d SHA-256: 2a84c31a5e8a004a9016eb323475babcc5907f489deb9219a22c236bb994ba65
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique commonly used in link farms or to direct users to malicious sites. Heuristics indicate it's an advance-fee scam lure, potentially related to lotteries or parcel deliveries. ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://wastran.ru/pbw?utm_term=100kb+pdf+compress
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/9525683.pdf
    • https://static.s123-cdn-static-d.com/uploads/4461744/normal_60b008147df98.pdf
    • https://sixanatol.weebly.com/uploads/1/3/4/6/134631849/86408aa613989e4.pdf
    • https://static.s123-cdn-static.com/uploads/4422390/normal_5ff0cc338a4f4.pdf
    • https://vonazevuza.weebly.com/uploads/1/3/4/6/134603973/xasixigisutaju.pdf
    • https://cdn-cms.f-static.net/uploads/4376374/normal_605dcc50d7056.pdf
    • https://cdn-cms.f-static.net/uploads/4476930/normal_6061c99d624f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dibesusajob.pbworks.com/f/esencial_joaquin_sabina_descargar.pdf
    • https://uploads.strikinglycdn.com/files/cf3c359f-372c-4277-9f3f-ac3764550bd4/consumo_de_drogas_tabaco_y_alcohol_en_los_adolescentes.pdf
    • http://joxakuruvi.pbworks.com/f/72592731546.pdf
    • https://uploads.strikinglycdn.com/files/0f75c377-8379-4726-8ded-2bd9062e6122/golusamopojabo.pdf
    • https://uploads.strikinglycdn.com/files/e114c516-9c2a-4d08-b678-cf93efeff9dd/68611547610.pdf
    • http://pivumiraw.pbworks.com/f/dinosaur_outline_coloring_pages.pdf
    • http://buzivevej.pbworks.com/w/file/fetch/144784527/bendy_and_the_ink_machine_2d_jugar_online_gratis.pdf
    • http://zabodovojif.pbworks.com/f/balancing_chemical_equations_word_problems_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/47055e50-616d-45ec-a232-b9a44aefedf3/what_is_information_communication_technology_definition.pdf
    • http://joxupakager.pbworks.com/f/the_giver_chapter_2_questions.pdf
    • https://uploads.strikinglycdn.com/files/d78b08e8-faab-450a-b402-1b41ef03e42e/breville_bov800xl_owners_manual.pdf
    • http://barotidi.pbworks.com/w/file/fetch/144759513/the_boss_baby_full_movie_in_hindi_download_rdxhd.pdf
    • https://uploads.strikinglycdn.com/files/65e697bc-43d8-4077-abcf-e2213ecb41e2/plano_de_leitura_bblica_em_um_ano_excel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea47.bin
c74e86495451b29541f025769dc4bcfdaa272a6a12c8730fa95bcf2270612409		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 4916 bytes
font_01_sfnt_off0000faeb.bin
9d324efb83e990a0ca1e131c5d123a848b576c3015ed7e5813ee3428a2ccaa4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEB 10748 bytes
font_02_sfnt_off00011fa8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA8 4324 bytes

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