Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e075b09b77d0ad…

MALICIOUS

PDF

85.6 KB Created: 2021-04-03 04:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6ae36564963fbd3ddf5ff6b00ec5f554 SHA-1: aa660ff584fb2b963ad820e6deebe3cab67bdd82 SHA-256: 25e075b09b77d0ad230023534037be3def77ff788fbbc63b2f47cf034cb525ba
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, with a critical ClamAV detection indicating it is a phishing trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests a link farm on disposable hosting, likely intended to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URIs and the ML_NYX_PDF_MALICIOUS flag strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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=aeons+end+legacy+solo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374021/normal_6035808a3c57b.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/zutowixabosenezive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_5fe7566e210a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_6038de5f21610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482399/normal_5ffff2644228c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5fe302254bf99.pdfIn PDF document text
    • http://zikizitepef.iblogger.org/31433098547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_601c6688ecf92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_603edecfe5b67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375894/normal_5feeb81e2d1c3.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/hglrTUo/music_identification_app_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419629/normal_602dffe5a2546.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/area_mixed_shapes_worksheet_answers_l1s1.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/eqjdpjg/endless_surfers_subway_runners_3d_print.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411686/normal_5fdc7c2eceb6e.pdfIn PDF document text
    • https://cdn.sqhk.co/nijedesakuj/ejihdIo/zesulesawapaguw.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/honeywell_programmable_light_switch_manual.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
    • http://talagolow.rf.gd/business_english_vocabulary_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e5de5b-56dc-48d6-a034-51be1d8c3984/how_to_become_a_marine_corp_drill_instructor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15872a51-e30b-4f86-9c5f-ce58011c98b9/clinical_pharmacology_and_therapeutics_mcq.pdfIn PDF document text
    • http://jevusavisa.epizy.com/gekebajodemob.pdfIn PDF document text
    • http://tujupifirafadus.myartsonline.com/totajibigizuxidijiwajizu.pdfIn PDF document text
    • http://pafomuwi.epizy.com/43379081433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ff24e8-b446-4f0f-ba9f-cd7a8fb7e7ea/48350621497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08fd07ee-57ee-4c9a-8605-8e841ceb8b47/bosch_800_series_dishwasher_with_crystaldry_reviews.pdfIn PDF document text
    • http://namegudobilud.epizy.com/ribedazupifefugexelewu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 4760 bytes
SHA-256: 31a0357f3c32eeddc4180c9210f6cf6967752368fcf6b39b32fe189a2bcd31e6
font_01_sfnt_off0001002c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 10908 bytes
SHA-256: 3857b24ca7821742379bc76c4e4d612af7869f7af9653cba340e264959dadf66
font_02_sfnt_off0001253b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253B 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off00013a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A02 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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