Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec5848ad0b62a8f…

MALICIOUS

PDF

73.6 KB Created: 2021-04-20 02:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fa318576bbf392f4e2f199fa5d57ce84 SHA-1: 4930531d477a4ad4ee21d6b386b2de5e10fca739 SHA-256: 4ec5848ad0b62a8fe3759944953df8c5905c4813d9e703afb10ff5c2b0525db0
176 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. It contains a high-severity heuristic indicating it's an SEO redirector link, likely used for a free-download phishing lure. The embedded URL, https://xezojetit.ru/strik?utm_term=wizards+and+warriors+3+nes, is the primary indicator of compromise. The document also suggests it is a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xezojetit.ru/strik?utm_term=wizards+and+warriors+3+nes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482190/normal_600a0f2495759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_600c1c0a08118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_6023ff365c80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_60584b4c7aac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_602aabef14988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_60511df8688cf.pdfIn PDF document text
    • http://shimano-stradic.ru/mk_11_android_download_apkfzi6n.pdfIn PDF document text
    • http://trokot-new.online/josonulomupui7gb.pdfIn PDF document text
    • http://jsexj.fun/arizona_driving_practice_test_20193f1wm.pdfIn PDF document text
    • http://kuxni.su/9438561710ecxi1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479226/normal_60082a8032901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fd356b403bed.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/metakibeme/76241286748.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/will_excel_formulas_work_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/liftmaster_377lm_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/35144595580.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/24390634567.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/jajuxesesekuribigigoxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/ac_dc_tnt_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/how_do_you_convert_an_image_to_grayscale_in_imagej.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/adulterers_full_movie_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/31731032664.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/allocation_of_funds_template.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_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 5104 bytes
SHA-256: b287c431cf82863a54520c4100a21d7f18b7fb4f167f8859f4607424f10be021
font_01_sfnt_off0000f432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF432 10760 bytes
SHA-256: 1705c214a97c9e7beb616324ffb6fc3249804cc46788fea1cd746d7d15e18fae