Malicious PDF — malware analysis report

Static analysis result for SHA-256 697bde7b7d7e77fb…

MALICIOUS

PDF

78.6 KB Created: 2021-04-14 22:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 114b5a3c310202d4b282ebbd36666224 SHA-1: ef4b06c5dab9dd30a98f3e55f261f747fe3b901e SHA-256: 697bde7b7d7e77fb624b7d6bacced5047a97f4eab9aa4554e9cada70bc626923
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely serve to redirect users to malicious sites, potentially for phishing or malware distribution.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=why+is+apa+important+in+psychology PDF link annotation
    • http://covid-19online.site/pimixabunugagaig7.pdfIn PDF document text
    • http://xteenware.online/89131059062al6m3.pdfIn PDF document text
    • http://plusstore.pro/87890696691n2c3h.pdfIn PDF document text
    • http://fajutixosisi.22web.org/22832249407.pdfIn PDF document text
    • http://peuly.xyz/56711263215vxfyv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_e86ff8f5eef84715a8536d77614246c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d331fdf9-a1e8-4a58-bb53-9a95ee3ac688/56523429000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acab98e-5ad9-492a-9662-0b23bda5be3e/the_wonder_weeks_after_leap_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d7adbc-4164-4ff6-8382-b545e05b7305/87134090209.pdfIn PDF document text
    • http://todogeduwogowev.epizy.com/argument_essay_outline_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd37be9b-63d4-4b11-8ebb-4b924bc69119/what_is_a_commercial_permit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da20cbe8-e5e7-484b-b392-8f18cb29dea3/zilupisekogirejijov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce82594-3341-4a70-a6ea-1c6cd3a8e751/78092068954.pdfIn PDF document text
    • http://gipatoxusopupos.epizy.com/21585392721.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_f0784223152d45639762ccc0b7dceec6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb383fe6-a91b-4314-b268-c4f1d8916e55/raputiv.pdfIn PDF document text
    • http://beverotunege.epizy.com/nababin.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_9a28649ecce84c308a23e4dbaced25d1.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_b839af100b5f4e5184e6edba0a6a1ad3.pdf?index=trueIn 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_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 5464 bytes
SHA-256: 253b15b984b5126947181d7796e9cfc66b1a01664f1101026a69b11877424bc1
font_01_sfnt_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 11304 bytes
SHA-256: 1e8a434a3c26e8770649882104f0f1fdbb495fe4249bacc1686ba3a9ce91dde7

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