Malicious PDF — malware analysis report

Static analysis result for SHA-256 35de7d58be83e745…

MALICIOUS

PDF

75.5 KB Created: 2021-01-20 01:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebe1b98cf40829a962df47cc14d2fa21 SHA-1: 7c2239d0722c54432d2656d0bc415735f61c0af7 SHA-256: 35de7d58be83e745cfd0f586117bbe06357df4dadc268d96cf2df6d87bac89a4
154 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=bbq+concession+trailers+for+sale+used
    • http://nufurimuler.iblogger.org/speak_softly_love_tab.pdf
    • https://cdn-cms.f-static.net/uploads/4479691/normal_5fa634191c523.pdf
    • https://site-1173152.mozfiles.com/files/1173152/26913799242.pdf
    • https://site-1166617.mozfiles.com/files/1166617/pixel_art_flags_color_by_number_online.pdf
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fb84aeda65ee.pdf
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5ffe7314d7956.pdf
    • https://xorewodanuvidiw.weebly.com/uploads/1/3/1/3/131381095/vupuvop_topopafokuki_fijezowu.pdf
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fb5e1ade04cc.pdf
    • https://static.s123-cdn-static.com/uploads/4447089/normal_5fedd4bb43e44.pdf
    • https://static.s123-cdn-static.com/uploads/4383692/normal_5fd098758884b.pdf
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5f917050f13e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zirojopemup/midnight_and_the_meaning_of_love_free.pdf
    • https://s3.amazonaws.com/dojonuta/motapilufima.pdf
    • https://s3.amazonaws.com/nonipesikiri/49904843959.pdf
    • http://bidetorula.rf.gd/nubufikobutumutugozo.pdf
    • http://tunazafagid.epizy.com/cape_town_water_levels.pdf
    • http://zerekigukazaja.epizy.com/tawabakikaporejafinoli.pdf
    • 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_off0000ea45.bin
b538f15b00f13394ee806cbb44bc54c8533624d2bf5b76afc30371ed82d7d0ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5328 bytes
font_01_sfnt_off0000fc6f.bin
a893547fde2c05c84a916932ad842c670a84d1f4ba25494e5186904e99920b58
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 10580 bytes