Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8e0899561d0b48…

MALICIOUS

PDF

108.4 KB Created: 2021-03-07 03:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2015291771a669000e48cf595e60ec77 SHA-1: ff853021eb62ee958652406ab28f99e14a14ea6f SHA-256: 0d8e0899561d0b48f6ce0cccdad9c7207d7397e3b1e3173ff8b90b1ee74de69f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://nipisod.ru/wix?keyword=borderlands+2+enemy+randomizer+infinite+loading+screen PDF link annotation
    • https://cdn.sqhk.co/ketadasogob/FheBied/my_ghost_girlfriend_v1._0._0_mods.pdfIn PDF document text
    • https://jufomefafuxujo.weebly.com/uploads/1/3/4/8/134890319/22f270f20f181c6.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/jjgchiR/96906812488.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/hXMjcOz/11243334877.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/95ji37m/wazugifisoxalekodibameju.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/jipuvesaxiviji-xinose-nubiba.pdfIn PDF document text
    • http://zenarajare.22web.org/advanced_excel_course_content.pdfIn PDF document text
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/jadidijij-gutitepoguj.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/bujagipefu_sifiguvuken_fetiletawoku_relusos.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/wufalugotuzujuk.pdfIn PDF document text
    • http://jutovutivori.22web.org/tujibigakopolafi.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/aicibhe/750014231.pdfIn PDF document text
    • http://repovor.22web.org/how_does_the_vacuum_tube_work.pdfIn PDF document text
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/gudaxi_noxesizi.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/hEid9hi/24294507252.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/pZljbgg/download_headhunters_io_mod_apk.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://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_c7e909851b724a6e8c869906303fa84d.pdf?index=trueIn PDF document text
    • http://towuzop.epizy.com/star_trek_voyager_episode_doctor_alpha_quadrant.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_27e131311d764038b353fe2206514695.pdf?index=trueIn PDF document text
    • http://senapofo.epizy.com/93319499744.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_off000151dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151DD 5464 bytes
SHA-256: 09851093ea3a1cdc44e176ea566c12aa5a687e271575bfd929fff926b7c08199
font_01_sfnt_off00016465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16465 15832 bytes
SHA-256: d8db8dffe7aaf64364ca957b97db2c906cc10b1123963870b46284be31145fed
font_02_sfnt_off00019602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19602 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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