Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a9fd5f030298c2…

MALICIOUS

PDF

74.4 KB Created: 2021-02-25 04:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5deb65dc35485ee1ef6a1e973bcf8e62 SHA-1: ef79aedf047659d0bca915faad1a17dd2cea2635 SHA-256: 46a9fd5f030298c24e253c2d16e7c30e76bc7a74fd3cf51a08b31497445100d3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the presence of a command like 'curl.pdf' pointing to 'http://loduwij.scienceontheweb.net/juzulolapidivuso', indicating an attempt to download and execute a secondary payload. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://leonvi.ru/award?keyword=whirlpool+certified+repair+near+me PDF link annotation
    • http://jiwapadenejeza.getenjoyment.net/48219106367.pdfIn PDF document text
    • https://namoturobiro.weebly.com/uploads/1/3/0/7/130739164/vuwomewexazoka-gupitof-xiverupuvipiviz-sokotifow.pdfIn PDF document text
    • https://wazexexa.weebly.com/uploads/1/3/5/3/135305699/lutakigariwisak-sisomanikid-lufijajom.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/ravutijogifuw.pdfIn PDF document text
    • http://vovality.club/929357096460aba7.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/how_to_make_creamy_lemon_garlic_sauce.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/what_is_process_description_in_technical_writing.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/tuzitirus.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/juzulolapidivusoku.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/how_much_does_a_honda_rebel_300_cost.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/juzulolapidivusoIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonabafat/immaculate_mary_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/manualidades_de_papel_faciles_para_mi_novio.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/international_public_relations_and_advertising.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/5543014657.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/xogedobinegoj.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/resistance_band_seated_bicep_curl.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 5228 bytes
SHA-256: b21b69e0f83a3eda0401d54ff5afe2136ebb37da3c8fdcd98f26d6248cc9c33f
font_01_sfnt_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 10152 bytes
SHA-256: 4f0c86a164f3311bad0a66c719b430e4487fa3766d1404c5a800b087b0e5f0fb

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