Malicious PDF — malware analysis report

Static analysis result for SHA-256 26077d81fb06b30e…

MALICIOUS

PDF

85.3 KB Created: 2021-03-30 09:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1b56e3ee6c87e795d78d977e0e1d504b SHA-1: 84ce1ecda0d1411007a9a002de0f4eeefb3678d9 SHA-256: 26077d81fb06b30ea46362942e681063d3901a193a3a99f15b2995ed690056b3
126 Risk Score

Malware Insights

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

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 0.9992

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://jumiwimov.ru/123?utm_term=hogwarts+mystery+chiara+answers PDF link annotation
    • https://cdn.sqhk.co/moturalogupe/mji3jej/10891892995.pdfIn PDF document text
    • https://zisinifaja.weebly.com/uploads/1/3/4/5/134599776/garasupaxugekonaxus.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/cLgdhjs/dual_monitor_wallpaper_hd_3840x2160.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/91847911777.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/66665053074.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/nextbook_8_tablet_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zomidami/HAcibhd/lavorogamufaxitawiropot.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/betty_azar_basic_english_grammar_workbook.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/zeralusu-wokijevedeginul.pdfIn PDF document text
    • https://cdn.sqhk.co/lidumezuvir/YhgicTy/dopadisinobogorufiforon.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/a3c3b.pdfIn PDF document text
    • https://duresanu.weebly.com/uploads/1/3/5/3/135334900/da96098e415a.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/e507ca74da.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/ij236Y7/halloween_sounds_mp3_download.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://zotijoxamofos.epizy.com/6591228601.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_2a29556860b144e2838c17feb4b54508.pdf?index=trueIn PDF document text
    • http://vakegugurebuv.rf.gd/potibixosifedolo.pdfIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_bc1903fcfced4b08885d268802ff1521.pdf?index=trueIn PDF document text
    • http://mijikabetabup.rf.gd/emotional_quotient_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/kannada_dictionary_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/ben_gurion_flight_arrivals_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/sekatinasonufupowo.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/nezuriruxavuj.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_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 5124 bytes
SHA-256: 8ca5f111fe601640b72606e3544c68931e7cc7da523ff19accfbe847701edc85
font_01_sfnt_off000114d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 10732 bytes
SHA-256: 448869726f64603c63d2c8094a13c11207dc4e079286bde0ce35dbb770e2d3ec
font_02_sfnt_off00013996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13996 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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