Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49ea108c2600ad6…

MALICIOUS

PDF

77.1 KB Created: 2021-04-15 19:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7d26796f9a73d1e963b3e6c81c3817eb SHA-1: bf3d13e656c4e3196364c4a16a33d75a251ce30a SHA-256: f49ea108c2600ad61b92f535e0a74909f3c3b188675f1cfa48081e1ae630d113
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on cloud storage services, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://nipisod.ru/strik?utm_term=is+ariston+a+good+washing+machine', appears to be a lure for users searching for appliance reviews. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=is+ariston+a+good+washing+machine PDF link annotation
    • https://xekitagib.weebly.com/uploads/1/3/4/6/134668592/3480791.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/6061675.pdfIn PDF document text
    • http://furniture21.online/lifufuxomipapimemonaz7il.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_600219a692b66.pdfIn PDF document text
    • http://blue-tick-central.com/baofeng_uv-5rtp_8_wattcfvq7.pdfIn PDF document text
    • http://nikaold.site/dupegogigaowa9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_6028aa252edd7.pdfIn PDF document text
    • http://reawont.online/sitefivavogatiramopugolarst23.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/7512806.pdfIn PDF document text
    • http://sparzha.club/948327407tw7zh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_603e24e1a29ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fdb60783d47d.pdfIn PDF document text
    • https://girowotejetut.weebly.com/uploads/1/3/1/4/131406843/xodiki.pdfIn PDF document text
    • http://zdsshop.top/sony_kds-60a2000_bulb2218s.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/the_floor_is_lava_host_death3dtkk.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/xovekolamoxe/pevezezutofera.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/dogadokamudesojisisid.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/7930643342.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_0d27801601e84432b3cc9d022b62bb96.pdf?index=trueIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_4b94f188066c4f6c819d55a271193140.pdf?index=trueIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_060b830decda40bba68b9e2a90ea8cb2.pdf?index=trueIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_1a74afe8368f4e39978a8cff642bd38f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/telasebisu/73516765257.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_off0000edef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEF 5348 bytes
SHA-256: 67cdb0ef97a37af152ae4e78d02c2ef321b2524a8b64015298344c0f8323162e
font_01_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 11124 bytes
SHA-256: 57257f2fce778d21e3c6c4bf38de47891ebaa4faf3964d0ab2498e89b1da7645

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