Malicious PDF — malware analysis report

Static analysis result for SHA-256 b591f2f74e6acdc8…

MALICIOUS

PDF

109.8 KB Created: 2021-03-15 11:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3bed0531f6d94ecb6c90d24bb8955623 SHA-1: eecb5736ce2248fe92f96aeff5800ba6b591650d SHA-256: b591f2f74e6acdc8b6a939f616ce2da229fe36674fc62b0ea31cc8b4096e9f8e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. The primary URL, https://xajibur.ru/wix?keyword=2006+saturn+ion+service+manual, is presented as a service manual, likely to entice users to click through to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://xajibur.ru/wix?keyword=2006+saturn+ion+service+manual PDF link annotation
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/bijubefapadizakezi.pdfIn PDF document text
    • https://bofubesal.weebly.com/uploads/1/3/5/9/135958810/fekifafaw.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/fbeeec5b18f4.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/abc65b20add.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/97363f35.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/hzjhrHT/39913518389.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/tunuluno-busekuled-gosuponiwojodab-kiveguvawab.pdfIn PDF document text
    • https://lurusavi.weebly.com/uploads/1/3/2/7/132710630/5464301.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/1571913.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/tRhfjbj/susakemixijisarolazekil.pdfIn PDF document text
    • https://tizetenu.weebly.com/uploads/1/3/3/9/133999913/ruwonudubedona.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/jjjiJhe/fm_radio_app_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/iaee_booth_guidelines.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_2d08a1c07ca947769e9d9dcccf696806.pdf?index=trueIn PDF document text
    • http://sojizodujibibo.epizy.com/argument_essay_examples_for_middle_school.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_233917348c6041e1a295a4b0a9d989d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/retalasoniredovaw.pdfIn PDF document text
    • http://jekopebajazitat.rf.gd/21093079000.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/indian_national_anthem_video_song_free.pdfIn PDF document text
    • http://folujas.epizy.com/99399546887.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_c6ef4da47d984bae83c6cff2c645d096.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17103 5336 bytes
SHA-256: 966ee07208c5effe8e79a609f41a1b8baefd0929a6070a90fb47289e1b828cbf
font_01_sfnt_off00018314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18314 10996 bytes
SHA-256: c0964c27f45f716e72b527846b02fd80e0cedc8340b5d6186d1c3ffe0b5a9cfc