Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc697e4148ccf04…

MALICIOUS

PDF

65.8 KB Created: 2021-02-17 06:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 018e9a1f4c9139b1888c66b11d98dee2 SHA-1: 427f6daa13554c7b2aa2f499339a168cbece6a62 SHA-256: 5cc697e4148ccf0455989be1a2231d073f8fd939b69ac4b9ee259032965e0a63
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains and link farms, indicating a likely SEO manipulation or phishing scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

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://jacksth.ru/wix?keyword=shark+professional+sweeper+manual PDF link annotation
    • https://cdn.sqhk.co/sinemajud/hb9PAhh/91694365836.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/giaoFih/mijijejez.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/eieihhm/21559996328.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/gg7jdhj/36251980105.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/7997418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485435/normal_6007305830ba8.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/fhdiiBQ/human_life_value_approach.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/7gdjbAv/75766526110.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/Pghiagh/fisodikuvepavop.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/cBjaSgd/twinkle_unicorn_cat_princess.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/geHsvij/fifepukutijuvuxonosa.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/iZ6O8W8/nokia_bounce_game_life_code.pdfIn PDF document text
    • http://wovolutoxali.iblogger.org/ldl_guidelines_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/9iSY7pv/cloud_9_movie_soundtrack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_60106eb44605b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duposavolat.rf.gd/20811665142.pdfIn PDF document text
    • http://navaradevopam.epizy.com/for_time_meaning_in_crossfit.pdfIn PDF document text
    • http://dabudevegifu.rf.gd/mapub.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_off0000c57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57A 5400 bytes
SHA-256: 2ede3f4231531baee7e5a48e353df4af6d23075367f2d2df9cf941ba56b64022
font_01_sfnt_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 10080 bytes
SHA-256: d3a1179191a272f975c05d39361d670c764c9e5be89f8766643e6252415b6344

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