Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0620b554d353347…

MALICIOUS

PDF

76.6 KB Created: 2021-04-14 21:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e5a4ae0981fc061c3080424c2ddfb999 SHA-1: cdf54769af699619cdfe61b1bf85baa31f24cf4f SHA-256: c0620b554d35334781d349c18b05b4965805940dc2e8d2fdc912bb763037e7b3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('golowaki.ru') that is likely used for phishing or to host further malicious content. The document's structure and embedded links suggest it is part of a phishing campaign designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://golowaki.ru/strik?utm_term=what+are+the+impacts+of+climate+change+on+meteorological+patterns PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371003/normal_5ff2d531909e4.pdfIn PDF document text
    • https://cdn.sqhk.co/liweruruzed/jiheThc/75596563756.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/8_characteristics_of_culture.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/book_of_acts_quiz_questions_and_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5fdd1990bf065.pdfIn PDF document text
    • http://xewitanajudozu.iblogger.org/87312049926.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/87727596030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_60590f1132f0c.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/36846191336.pdfIn PDF document text
    • http://tepazoropev.iblogger.org/vixema.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/staq5hc/tijatimekatugobizutoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_60678510abb49.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/rjighcb/samsung_accessory_service_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_6066b7938852e.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/83700523827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://965bd944-310b-4209-a71a-d16e45aaced4.filesusr.com/ugd/5f02e6_d1e054c7bada4be2881707d99c58fe4a.pdf?index=trueIn PDF document text
    • http://fefadazagiwafuz.rf.gd/can_you_still_tone_up_while_pregnant.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_0f595e0e838943cc9737fe1604500b42.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_75cdc21b5d6e459abcc33d0d86faf9b2.pdf?index=trueIn PDF document text
    • http://nakuruxut.epizy.com/intermatic_st01c_-_in-wall_timer_manual.pdfIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_848be7daacf94c7ea9a0feaef37888f6.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_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 5444 bytes
SHA-256: 8cb81a522f0321887108d6ea7744f9b5e5e78f8a72e0a2ff607d500415e89a4a
font_01_sfnt_off0000ffb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 10816 bytes
SHA-256: 710ac4e145b9aafa3d00402ee107cc8ec8df2584f3f169ee848c4ffdd7c3cf04

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