Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3475b41c65c912…

MALICIOUS

PDF

95.5 KB Created: 2021-03-04 18:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7b2f733b3e04061521e41dfbb42c8b0b SHA-1: d6f67d6fbbb8fd2325c3e30adcb3aa12b40eeda5 SHA-256: 2f3475b41c65c912337a151f43e2092de61f072c56fd3da0536242c10947589d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=practice+b+congruence+and+transformations+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5ff3d4f339f47.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/igjbOgi/rome_total_war_alexander_cheats_create_unit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_60385d5c6a7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_6027cfbe76545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_60142fe90a752.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/ifggLMR/star_wars_squadrons_trailer_hunted.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/1465510.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/vMghfhc/vupapapesekilulolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6015b900ee89c.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/bolot.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/xesiwogav.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/8809126.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/fudefoxugutak.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/044f9f3dc2827.pdfIn PDF document text
    • https://kexekogu.weebly.com/uploads/1/3/1/3/131384418/9008936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368226/normal_6004ae7d54a19.pdfIn PDF document text
    • https://totaguzoxexidi.weebly.com/uploads/1/3/2/7/132741029/71a12cccc4b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/088cf684-312b-4ee5-ab4d-40aa0b88d4a5/why_do_the_blood_vessels_around_my_eyes_keep_bursting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45414ccb-f7b5-4354-b2e1-55ffd7ad41d4/rurirafoparusitosex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bff5e1-917a-4e75-a411-874ca947a657/89179681785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5daa83-1228-457c-98e0-d0b37aa6236c/vumito.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001233f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233F 5544 bytes
SHA-256: ba7dc292b0d92cf518d28f57953aabd747459cd13f1b2e7b9cc9e0c81a18c911
font_01_sfnt_off00013612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13612 10712 bytes
SHA-256: 4351fbafd6503df7d394200bb14de9ef58d8d4568d5a4f49123711a800c4c87c
font_02_sfnt_off00015aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA8 16072 bytes
SHA-256: ab6a2d92c6195441154fe03e3add47570783810922a3b82dfc3833ffb97f5f96