Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11806e56c30657e…

MALICIOUS

PDF

89.9 KB Created: 2021-03-15 11:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acc7f568cb434327162da2f9de8f2d21 SHA-1: 55ba71e5d01a8763159c60df498756a1786249fc SHA-256: f11806e56c30657eed9b3a349d583664ffd0de04056413b0cf80656095883995
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a 'link farm', suggesting a malicious intent to direct users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness, with the primary attack pattern being the distribution of malicious links. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=theotokos+and+child+hagia+sophia
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/kufetedujisipepi.pdf
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/ritudibo-fusewubapezan-nutelagu-sagidetomo.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_60415bbcc9478.pdf
    • https://cdn-cms.f-static.net/uploads/4426551/normal_602645c244cd7.pdf
    • https://cdn-cms.f-static.net/uploads/4453741/normal_6025fa46b27bc.pdf
    • http://fubikopelemom.mypressonline.com/wendys_chili_nutrition_gluten_free.pdf
    • http://xosubowavenu.mypressonline.com/where_can_i_donate_clothing_for_veterans.pdf
    • http://xutifufaxe.mypressonline.com/abridged_english_novels.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ccf7f3bc-2ed0-4e12-aab9-b78441569e89/what_is_the_value_of_a_2007_chevy_impala.pdf
    • https://uploads.strikinglycdn.com/files/08997381-f88a-48c3-b2d9-3d8085ace90d/dan_simmons_hyperion.pdf
    • http://lanosebezazov.onlinewebshop.net/formula_del_volumen_de_una_prisma_cuadrangular.pdf
    • https://s3.amazonaws.com/lorugipopuxe/cadillacs_and_dinosaurs_20_gun_free.pdf
    • https://uploads.strikinglycdn.com/files/866edb68-4df3-4f0d-96db-dc991835b7f3/viravow.pdf
    • http://pidodexogejax.myartsonline.com/sovidagedugenuligotin.pdf
    • https://uploads.strikinglycdn.com/files/ab8b0ada-21ea-45d3-9644-282ef2a7f36a/html_css_class_attribute.pdf
    • https://uploads.strikinglycdn.com/files/5e9d0508-bcd7-44a9-8803-ebbee29db9ec/what_is_the_story_of_fried_green_tomatoes.pdf
    • https://uploads.strikinglycdn.com/files/b9777843-5e90-4070-a3c5-c4259f9ae9ca/50770510092.pdf
    • https://s3.amazonaws.com/wemazun/learn_basic_english_speaking.pdf
    • https://s3.amazonaws.com/muvevanepen/nixon_sentry_chrono_instructions.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_off0001233d.bin
40c15c0c84cc6a50f5479b3cb1cb0d677a2aed2f66af9dc2794f32fe8f92a38d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 5252 bytes
font_01_sfnt_off0001351c.bin
4d3775c1d3ce86a16f220ed1e68fcafa5e33e1c086a6cc64b593ef0eebb6e9a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1351C 11160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.