Malicious PDF — malware analysis report

Static analysis result for SHA-256 7749d966d13ee630…

MALICIOUS

PDF

68.4 KB Created: 2021-04-17 05:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 380fb66589fe8bed1bf1f44e4d8df84a SHA-1: 076103f01a516022000842a8e82415b4b4600345 SHA-256: 7749d966d13ee63073b8cf94b42532cc97f3c0f6e69d787f3dc00fea91581f19
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://lozipotod.ru/strik, which is likely used to redirect the user to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=fluval+406+parts+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5fd7d93790a94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_5fd1b6b82ee66.pdfIn PDF document text
    • http://basidugom.mygamesonline.org/41856217107.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/zumezeviwakiz/72141191034.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/minecraft_windows_10_free_download_1.16.10.pdfIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_47de55e60db147c89a9905b2d4132844.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/guitar_blues_licks_goldmine.pdfIn PDF document text
    • https://abc5f1b3-ad37-4660-b048-d9bff2240d70.filesusr.com/ugd/a1fb68_36635ad238904a818789aaf84c103c2c.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_b7d4c7759fd04b35a9fc8f57d8f241fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/37308964453.pdfIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_b2734091d2f64f64b07b0a58acdc1ed2.pdf?index=trueIn PDF document text
    • https://dfabac9c-3a78-4d86-b112-ccf1750024e9.filesusr.com/ugd/b46e2f_cfc6b9f897434d7cb6b083ad00463cf8.pdf?index=trueIn PDF document text
    • http://tiwedozesa.atwebpages.com/ncert_maths_class_11.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/barcarolle_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e84fb2f-38d6-46a5-a9b9-678c60c57243/84091562551.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/26744122376.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/wedding_planning_budget_template.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_79c83a81b8134f0f9da1e0f3c3795787.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b02e16-03d5-4ab8-90ac-7dceab2b8792/how_to_connect_jabra_talk_55.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_4ac1c7e4d59144399166f3ab047173dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/lirurezamisew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85bc510-c6ce-4080-b3d3-e702889f8ae1/pulebobogomemadarijexufo.pdfIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_6570f630a2ec40b8ad3c3849efec2c56.pdf?index=trueIn 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_off0000cbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC4 5680 bytes
SHA-256: d95205dbfce3471a9d012044fa84e5c42ee09bc57d4b22d5b86acaa45525ab43
font_01_sfnt_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 10628 bytes
SHA-256: bc9ce8d379d4afc2c41755e72cd328053a7c972deab85253a12f6155b8660382