Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ca37ee468cf400…

MALICIOUS

PDF

82.9 KB Created: 2021-03-17 19:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 577c523025832911b91bf9babd40935f SHA-1: 5f50d85dac9724addd2330005b6fb2c070f24f1f SHA-256: 12ca37ee468cf400c3012ad1ff6d3afdf92982ee35154fdcc16e606f331c7a3a
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a notable one pointing to 'https://xezojetit.ru/wix?keyword=dr+mario+apk+mod', suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to host many links on disposable hosting, a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=dr+mario+apk+mod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5fe0e9d88f242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_5fff7eb873fb1.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/e32b2921ae2bb02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5fefc84696d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_603602b045db8.pdfIn PDF document text
    • http://hotel-engels.ru/vepavuz1olza.pdfIn PDF document text
    • http://triple-doska5.club/dinoserunixopadobixjgluj.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/il_playbook_di_barney_stinson.pdfIn PDF document text
    • http://coolvdomaion.online/80651233926tuwad.pdfIn PDF document text
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/0ff201fb41.pdfIn PDF document text
    • https://leliwigozamik.weebly.com/uploads/1/3/0/7/130738568/2284251.pdfIn PDF document text
    • http://lightsex.ru/meet_long_lost_friend_meaning5jvap.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/jivamubug/how_to_reset_oreck_air_purifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1c50c0-652e-446e-b05c-9c6baa915c33/three_billy_goats_gruff_scholastic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74423c49-4818-4764-bd28-8e34c46e74b1/denojiwenokimokani.pdfIn PDF document text
    • http://revodez.myartsonline.com/pupiserapeluwedefevox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe55791-5690-46b4-9fee-02aa73c16c5c/97719854817.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/business_administration_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/36511143184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6853b6df-1856-4083-8991-a1c57dd80354/7771036754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31476d0-0d03-457d-8589-dc73e4b2be34/ms_project_gantt_chart_online.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_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 4960 bytes
SHA-256: 2247e12816bfb3722393868b245c4a42b27f450938a712114cfa53fc8dcb78de
font_02_sfnt_off000118ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 10904 bytes
SHA-256: 228cfed172130c7c59f0fcbf49c0e98adca24a1e23dab094fd2762e3a6447947

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