Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d19623ceb7c9c8…

MALICIOUS

PDF

77.9 KB Created: 2021-03-22 13:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0c1d39250b8472254b82fd4c91661c SHA-1: 48f7878780475d6c9973e7dd0b2bfd1541e1f434 SHA-256: 52d19623ceb7c9c871e8ee0188925b1b482ecd9bb327c47793d097031b51df2a
156 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. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO manipulation or to distribute further malicious content. The embedded URL 'https://maypoin.ru/wix?keyword=adobe+premiere+cracked+pc' indicates a lure related to cracked software, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=adobe+premiere+cracked+pc
    • https://cdn.sqhk.co/janimivaxo/ghcKTQB/service_provider_corporation.pdf
    • https://static.s123-cdn-static.com/uploads/4443809/normal_5ff07e02f006c.pdf
    • https://cdn.sqhk.co/tajudozizif/Q3YjbKx/different_prop_hunt_maps_fortnite_codes.pdf
    • https://cdn.sqhk.co/tizalenifo/gBgh5hd/kulomidudexonapejufu.pdf
    • https://static.s123-cdn-static.com/uploads/4481163/normal_5fe02cf63f3e4.pdf
    • https://cdn.sqhk.co/kagofiwavum/bhh08TO/bamegu.pdf
    • https://cdn.sqhk.co/lomasamube/02Yhegf/shop_bet9ja_old_mobile_simba.pdf
    • https://cdn.sqhk.co/kebabefepu/hgijibo/47075888723.pdf
    • https://cdn.sqhk.co/dasofuduveje/g04shhe/27494926635.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juvikavirilija.rf.gd/72077125880.pdf
    • http://nolumer.rf.gd/87118596586.pdf
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_6b9573f6a6b348a7b1ca71c5fb38ad3a.pdf?index=true
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_532fbc436feb41769900b5c5bc384ce7.pdf?index=true
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_1cc557a967f54a95b9430ef728bac073.pdf?index=true
    • http://doroxokile.epizy.com/24391495251.pdf
    • http://rifoleb.epizy.com/61198254670.pdf
    • http://letupekego.rf.gd/what_is_the_most_watched_news_program.pdf
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_3d152fd77938463bb112e450d1c83980.pdf?index=true
    • http://fobukisa.rf.gd/weekly_itinerary_format_in_excel.pdf
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_924f628993104bef9ecfdbde5b25a156.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f45f.bin
1ba919667acb76f36cd89e06d1d483075bf2717cd3392fcad9becca309cace86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 5204 bytes
font_01_sfnt_off000105f5.bin
b2044d99768d2bbcdc0f1ca951624c4da9ea694363c363f433bdbe855191f604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 10712 bytes

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