Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce133e02b4ec2dfd…

MALICIOUS

PDF

65.9 KB Created: 2021-04-07 01:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9529016994589dbe6a5aff54e7a3bd7 SHA-1: 9ffa10ba80ed1fbf3da0e47ecd049843d65891c5 SHA-256: ce133e02b4ec2dfdbc0143c65c4a29f1870a3cc487961fb9afe9def1272504f2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://jacksth.ru/award?keyword=logistics+company+presentation+pdf', is flagged as suspicious and likely serves as a lure. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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/award?keyword=logistics+company+presentation+pdf
    • http://wwbook.org/givutelit1q2tq.pdf
    • http://afterdealer.pro/kofabozapetemuridoua3b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/godoremitiwuja/88477474606.pdf
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_a13539ca71a24bb4ba85961715faefb9.pdf?index=true
    • https://s3.amazonaws.com/zidenigad/how_to_teach_storyboarding.pdf
    • https://uploads.strikinglycdn.com/files/ab50f90a-327e-4291-8ebf-67bdc41c98e4/how_do_you_charge_mophie_juice_pack_air.pdf
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_2b83740613a046d0bba956ca8b02149e.pdf?index=true
    • http://pedirite.onlinewebshop.net/dikukufuvoxemagub.pdf
    • https://s3.amazonaws.com/fukepez/architecture_portfolio_design_templates.pdf
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_3252f7ded2074b76a6be215a97bb5a2e.pdf?index=true
    • http://kifesafijupesob.onlinewebshop.net/what_is_general_deterrence.pdf
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_e7ed7fc27a4945109d11c19bdabe335f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cd4ed266-ec97-4722-b7cb-59fe627c6e61/sepageferavot.pdf
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_9fd181ec8a07408498b26b455189d354.pdf?index=true
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_93e6db2cdb964f3a97873d427b72d9c5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bdf6014c-8f64-413a-8d11-564161463532/what_stocks_to_watch_after_the_election.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3cd.bin
59dea50fcf4c1a351158f3603ef2ff852b096de1cf12868a49dea21658f98a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CD 5488 bytes
font_01_sfnt_off0000d675.bin
bcb5ac8cff4c082b34eeca78097afd5c6fdb5a63c4a6dfa0cd6309c8883503c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 10140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.