Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe24c0e1ca06c4a…

MALICIOUS

PDF

81.1 KB Created: 2021-03-21 08:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025dfd0990a3a211784b0a639a6ae559 SHA-1: e330c94e6240b58f3a510d33e52a94d1669bb503 SHA-256: 6fe24c0e1ca06c4aba00615714317225d34e9c0d5020e0ec1c235abf54c7e3b7
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, suggesting a link farm or phishing attempt. The 'PDF_SEO_LINK_FARM' heuristic and the presence of multiple embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=journeys+grade+4+student+edition
    • http://idealica-tufficiale.website/island_of_doctor_moreau_documentary_netflixc8zi2.pdf
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/6175350.pdf
    • http://ketotreno.buzz/hp_scan_not_working_on_mac_catalinakkyq6.pdf
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/wuwonixotuva-zibisomofobi-lifed.pdf
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/76a88.pdf
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/f66486dadd8d.pdf
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/bizepi-nidekukotufew.pdf
    • http://busibear.com/planes_y_programas_2011_secundaria_tecnologaerhh9.pdf
    • http://natur-green.fun/aisc_13th_edition_manualzvp1k.pdf
    • https://gokaxavel.weebly.com/uploads/1/3/5/3/135316782/64e453.pdf
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/xizetunijumop.pdf
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/1314546
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/bd9aac5b-3871-473f-984a-890e78497af8/power_washer_pump_oil_capacity.pdf
    • https://uploads.strikinglycdn.com/files/89c3f420-93f8-4c24-b3ce-bb3cdba9c2d6/what_is_the_systems_engineering_process.pdf
    • https://uploads.strikinglycdn.com/files/f748b908-369c-4893-9d7e-cd1a5478acf1/how_to_start_paint_from_cmd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f402.bin
b207effb19e1b21f56530f68fc33838f72e638b4e7e2d3b14d889d4a8c3045cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 5024 bytes
font_01_sfnt_off0001052e.bin
e6bba52cedafd850f97e22eded62bce749835c993d182c591d3d4313b3854a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 10568 bytes
font_02_sfnt_off0001296c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1296C 4324 bytes

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