Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ff18fba832d000…

MALICIOUS

PDF

72.7 KB Created: 2021-03-01 02:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 296c844a8a675bb0844589e4c655734d SHA-1: eeb68bd476e539610b49338937e9f1eeb3d9beaf SHA-256: d0ff18fba832d000c0311251d2aad980fb928180dc68d5716657e422013fac70
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/123?utm_term=how+to+get+brother+printer+back+online+mac PDF link annotation
    • http://stopnutristrike.ru/63725554686r5qb2.pdfIn PDF document text
    • https://cdn.sqhk.co/lilovenodi/gdpX5aJ/bee_brilliant_blast_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/jcVRHi5/gorapebudanomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_6033f10e0a802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_602a00428c9c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426072/normal_5ffb8884f1197.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/mejobe.pdfIn PDF document text
    • https://cdn.sqhk.co/liweruruzed/dgigdij/nenepubuvofugiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/jgir3hi/scooby_doo_zombie_island_villains_wiki.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/dazuxujepov/16563351348.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/38304884652.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/voids_wrath_crazy_craft_2._2.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_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 5424 bytes
SHA-256: d88a45f3ecfcb99f307c5d7c36bfb483882e695c670e6877b8c119f7eeac4576
font_01_sfnt_off0000f00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00E 11256 bytes
SHA-256: a1dc9a2650371280b4079ea3ee7c16b44cb88efd00c46120ec482daee0a0a365