Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69079151c3e0b44…

MALICIOUS

PDF

87.7 KB Created: 2021-03-21 03:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 011d7217ab086173ce13205e2b1f5fbb SHA-1: 5806e690d22ca0e4936b72520dda41b484a94603 SHA-256: e69079151c3e0b440d54437ae819e66c968d8f4f949ccb7d6d4d72dd2a254e0a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to research topics, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://botokaw.ru/wix?keyword=principales+exponentes+de+la+investigacion+cualitativa PDF link annotation
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/mapozotixenep-lafaboja-rojebi.pdfIn PDF document text
    • http://lifizix.22web.org/43684710467.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/7213156.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/3131590.pdfIn PDF document text
    • https://gimeboxevamovuv.weebly.com/uploads/1/3/4/4/134494840/vagagobikejupupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_604b8188da9ce.pdfIn PDF document text
    • http://rutonujak.iblogger.org/84873414182.pdfIn PDF document text
    • http://kufizuvepopes.22web.org/rokonejozig.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/6444070.pdfIn PDF document text
    • http://vuvafasanadiwi.iblogger.org/63043551006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6034d4435603c.pdfIn PDF document text
    • http://vipifud.22web.org/bebefot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fd6c269eb925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godimodasixor.rf.gd/york_chiller_ylaa_manual.pdfIn PDF document text
    • http://xajejosiwoja.epizy.com/38595722495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13be1bcf-af4f-48b8-bd32-b23f8968078c/30002676916.pdfIn PDF document text
    • http://konevimojo.epizy.com/causes_of_water_pollution_in_points.pdfIn PDF document text
    • http://sedoguzod.rf.gd/open_datasheet_view_access.pdfIn PDF document text
    • http://difugarulid.epizy.com/36593905437.pdfIn PDF document text
    • http://dupivet.epizy.com/hackerrank_questions_and_answers_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbaa3ef-ff88-4e17-b915-36d9cadd5a2b/computer_basics_worksheet_answer_key_section_3.pdfIn PDF document text
    • http://laxojidosap.epizy.com/descargar_acordeon_virtual_para_android.pdfIn PDF document text
    • http://muvaxuzuf.rf.gd/16781725130.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_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 3160 bytes
SHA-256: a45f3b09da088b59b5fe8ca5b69bc6cb9523b3b55fcac728101acd955aaab006
font_01_sfnt_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 5372 bytes
SHA-256: 0867d803a11ac9529573dad53e98e861e63566c7249ef17f779fcf22d78d4a7f
font_02_sfnt_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 12552 bytes
SHA-256: 565dfca88637d072b181c3eb110762c55d114a75af8b0a57af1c81e770fc30d5
font_03_sfnt_off000137fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FE 16496 bytes
SHA-256: 156ca8fc0ffcdf7e31d3054cb322f5482e9d1cadc74a6b6e3085711bab70d435