Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2872885f78f06b…

MALICIOUS

PDF

62.3 KB Created: 2021-01-23 21:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e22dbb85d99a9b673e04dcd9c670c815 SHA-1: 1de3d02082c68923878dbe78890d22bbcc9b362d SHA-256: 6f2872885f78f06b8e3fe48248ac0736f9c5fb29e3ca270c859b572e29d7d389
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It contains an embedded URL that likely leads to a malicious payload, disguised as a faucet manual. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafffi.ru/123?utm_term=kohler+faucet+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376088/normal_6000bdd0c03c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5fd60ce7784c5.pdfIn PDF document text
    • http://rexapeduke.66ghz.com/harry_potter_1_book_report.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/hejiMhd/rope_hero_vice_town_spider_man.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380229/normal_6007fc7cd0835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454161/normal_600c028e7abbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_5fd03d503860f.pdfIn PDF document text
    • https://cdn.sqhk.co/jexozumumanu/i8djfDw/50953398979.pdfIn PDF document text
    • https://site-1172565.mozfiles.com/files/1172565/shadow_of_the_dragon.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/iphbltd/11057003343.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/muvazi/vespa_lxv_150_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/8882433544.pdfIn PDF document text
    • http://xilavivugup.epizy.com/ziniriwinapana.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/viwuzerenof.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/zozojisumemimutopironapom.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_off0000b88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB88F 4912 bytes
SHA-256: c86238d5e4b2d939baf1a9198d778f8b0add0e793026ddd10adeecab7ab8aba9
font_01_sfnt_off0000c921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC921 10740 bytes
SHA-256: ee81e113e55229bde84863f564f6472525b49f2ba701f07e76f469dcfb7b7320