Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c64a2296058cb2…

MALICIOUS

PDF

71.4 KB Created: 2021-03-05 07:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: db4b0133df8ad088c05a6cd287fefefb SHA-1: 15ec98e6f2566b8f3bd4e25096abaed10c9b259c SHA-256: 71c64a2296058cb2e6238410333ccd628acd195a9058e92c05c22a0a6be78167
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to real estate search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=dr+seuss+house+for+sale PDF link annotation
    • https://cdn.sqhk.co/xanodujijefu/iiggeid/36368265117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_5ff8b850d80eb.pdfIn PDF document text
    • http://kihepc.xyz/space_shuttle_toy_with_rocket_boostersonzla.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/7432830987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499023/normal_600d6b146d3ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5fcc6707e42ee.pdfIn PDF document text
    • http://mebelintera.ru/minority_report_plot96hse.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/pdf_harry_potter_printable_activities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_6024704a4aa62.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/27334976384.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/81815444996.pdfIn PDF document text
    • http://avbox.org/pumpkin_carver_tool_near_mehk0bm.pdfIn PDF document text
    • http://smilex.club/75903749592qywgd.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/zhahahi/pejisivexovufodufowuvajut.pdfIn PDF document text
    • http://freshka.fun/733912481924zp84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_603f8850ef6c6.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://s3.amazonaws.com/wazagidonux/mejofepegolubu.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/apple_developer_catalina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45811ae-5450-448b-a740-cd0d67c1834c/simcity_4_deluxe_money_trainer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50390f34-2334-433d-bd48-216cecb072b2/breckwell_p22_pellet_stove_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/30520456827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222e490f-484f-465a-826e-b6869def7749/how_many_words_does_the_average_24_month_old_know.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/deferred_payment_meaning_credit_report.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/dr_seuss_happy_birthday_to_you_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf9a746-3a53-4bed-9580-67bee01dcbc6/32251540355.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_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 4504 bytes
SHA-256: 632d81355a43ba8b8a85083afaf56f46599148dde2b8c366cc405b09ed231e1b
font_01_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 9460 bytes
SHA-256: c9f90a1c9f85fbc78e21e11e5ae1e69e67488509e958a590787a45323b664c3f
font_02_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230