Malicious PDF — malware analysis report

Static analysis result for SHA-256 339bcce395c8652e…

MALICIOUS

PDF

75.8 KB Created: 2021-02-10 02:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6f25aa0122992c3c6dbac4fdbad0e2d3 SHA-1: fd84d9ec31a5e6c3687829fbc50ee0cbfb642b11 SHA-256: 339bcce395c8652e7791dc4a4ea4d04236f32a7d5cd39b2e86e22890e2c6ad42
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs, such as https://jacksth.ru/wb?keyword=bteb%20result%202019%205th%20semester%20pdf, are likely used to redirect users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jacksth.ru/wb?keyword=bteb%20result%202019%205th%20semester%20pdf PDF link annotation
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/zatutupojovonijow.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/jixubijipiwireboti.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/H8ia4ii/movie_quiz_ultimate_level_16.pdfIn PDF document text
    • http://excellent-spb.ru/257683090200bii.pdfIn PDF document text
    • http://balifruit.com/duck_hunt_vr_gameplaykioa0.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/gijihfd/efootball_pes_2021_mobile_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368488/normal_5fe065e940d05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fc9b1f550eb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fdfa9e5b8275.pdfIn PDF document text
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/cae2ddd335a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5fe21a0aa05b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5fdc2a7de88d6.pdfIn PDF document text
    • http://fredo.run/zopodawusulov8vqn8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_5fc9166834bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470964/normal_5fec89274af93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gakupoxefale.epizy.com/columna_campaniforme_definicion.pdfIn PDF document text
    • http://jezesukawug.rf.gd/pyelonephritis_guidelines_idsa.pdfIn PDF document text
    • http://guradewididexep.epizy.com/vidmate_app_video_install.pdfIn PDF document text
    • http://pevivudawof.epizy.com/pubg_mobile_uc_generator.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12C 5868 bytes
SHA-256: 591bbb8e04840f5b639425886e135888b0730844b1717b1820eca8406eb294a2
font_01_sfnt_off0000e4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F4 7968 bytes
SHA-256: 9b96cf2d2fd363262db6f6820c0bffcbdd5b4a3f938b232b25a719eafb136937
font_02_sfnt_off0000fd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD20 10676 bytes
SHA-256: 0ee913ff71e6ee09858cebeda4a00a51223c3025a37653f3b1a525f9150c331a

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