Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2bef3fd78f95ee…

MALICIOUS

PDF

76.8 KB Created: 2021-04-26 19:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1d584101b3baef5bb1cbfe7211b3878c SHA-1: 9a4d0cae312fe13b765df24d3314d4e3cc27defa SHA-256: eb2bef3fd78f95ee16c330a04a7ce61a712fd68ac67e9c01a7a0ec3fbaf3934f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://yafferge.ru/strik?utm_term=life+is+short+life+quotes, is identified as a malicious redirector. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=life+is+short+life+quotes In PDF document text
    • https://cdn.sqhk.co/zoxogatuv/gd0jhhh/32528560581.pdfIn PDF document text
    • http://losqutoq.online/gapovuvavitutogkjndo.pdfIn PDF document text
    • http://instasale.company/jazomirokakusezbmzr.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/ijjBEhj/lulepawen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fd7db7fd54f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_6016613984cb6.pdfIn PDF document text
    • http://wovemabib.iblogger.org/tutoteg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425727/normal_601cf735abaa3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392867/normal_5fddd4ac11826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5fe3c26d448de.pdfIn PDF document text
    • http://goodsfor.life/lamborghini_gallardo_superleggera_price_in_mumbai8apbf.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/furunumaroxun/94154868232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d249343e-793b-4901-ae47-a8eb580f2acb/club_c_shoes_cardi_b.pdfIn PDF document text
    • http://lujijodexel.epizy.com/25748640118.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/43872840192.pdfIn PDF document text
    • http://vobipugiwexidu.epizy.com/66958305880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cdf0619-1c96-416e-93ce-2dac47f443b2/who_has_the_most_grammys_for_singing.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/folevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c331c8-e851-43b9-b90d-030db5c2bb84/what_medical_conditions_can_disqualify_you_from_the_military.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/55800930808.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/43009693478.pdfIn PDF document text
    • http://lipelizirivalul.epizy.com/nuwetusotagezenavo.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/sunabup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58fb865-6710-4e60-8c2d-2e42da5c8400/bulking_diet_meal_plan_vegetarian.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_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 4712 bytes
SHA-256: de48efdd27e727c9065c63ced9ba6966197e71ee705418680a2038c1cb398e71
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 10664 bytes
SHA-256: 592d7e0f8c4b3b2fd9005cc4a8895f300b339797280dbbfa10c135656a32063c

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