Malicious PDF — malware analysis report

Static analysis result for SHA-256 baeabc44f3340862…

MALICIOUS

PDF

92.8 KB Created: 2021-03-20 00:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7a585dd62ed1d0639346159e605be2d8 SHA-1: d99034580559d6c6410ad8b5446586e73ace73cf SHA-256: baeabc44f33408621165d0dfa01c56b45a4c3b211c1a2d244591f9ea5485b674
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://soxebez.ru/strik?utm_term=what+does+proof+of+service+by+mail+meaning', is suspicious and likely leads to a malicious site. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan payload. The document body, though heavily obfuscated, appears to be a lure related to legal terms, suggesting a phishing or social engineering attack.

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://soxebez.ru/strik?utm_term=what+does+proof+of+service+by+mail+meaning PDF link annotation
    • https://vipavogezeguw.weebly.com/uploads/1/3/1/0/131069860/1418353.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/6471686.pdfIn PDF document text
    • https://roginibexit.weebly.com/uploads/1/3/0/9/130969264/xolusopu.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/fijodafaviv.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/nuwoxuni.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/tubukeganuji/sexopakosabidujafutakesur.pdfIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_e35aa0d12ff84b2a985533790c239efb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/80384347569.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_19a6060b3c0844b1a3ce411459cd24ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/10078014062.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/pokemon_masters_guide_chapter_15.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/1047746389.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/18053790295.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/miwobetigedogeroduwupug.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/bozekikot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa277d54-5ec9-4da5-a6ac-b926c2fc7db6/sexixafobire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd917c60-a42b-4105-92ce-c8ee7fb374dd/sufajusowopuxesamitevubil.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_off00012c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C43 5884 bytes
SHA-256: 38c5faf54db68d4f9b1a6b3ec3abd7c2adb2dd37142b761cf2d03fecf55cc99b
font_01_sfnt_off00014038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14038 11092 bytes
SHA-256: 58d11c00b148125af4c8f5e6480d5893331483e559d767caf7d0bca77f44ac83

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