Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae637e007cc636f…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 19:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7f9df53a919daf815329e746b5941d19 SHA-1: 192cabf46c7c786b6d69adf115ae8723e36145ca SHA-256: fae637e007cc636fdaa730849f7370ced86cde5a8f5446dffdd8967e80108c80
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicative of a link farm designed to drive traffic. The embedded content, though heavily obfuscated, suggests a lure related to 'Photoshop tutorials for beginners malayalam'. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=photoshop+tutorials+for+beginners+malayalam PDF link annotation
    • https://vuzitiruf.weebly.com/uploads/1/3/2/8/132814505/9186218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_602e4d1649a55.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/ibgdggj/96815111181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_600dfe3e44966.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/xKhhjfE/tikboost_boost_followers_likes_and_fans.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/hBqYrih/fefavu.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/by3gegf/halloween_cupcakes_recipe_scary.pdfIn PDF document text
    • https://dexasarejujevi.weebly.com/uploads/1/3/1/4/131454537/toxulin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_6017c6e1c2a24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_6045e071b4eb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_60157b0bce2c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_6050426aea4d2.pdfIn PDF document text
    • https://bowiromifax.weebly.com/uploads/1/3/4/6/134613330/4414f.pdfIn PDF document text
    • https://cdn.sqhk.co/wegifopi/PP35Thc/talking_tom_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/fbX1y9f/java_generate_64_bit_random_number.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/bpbjfjh/16550599313.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/Riihdhe/small_online_business_ideas_for_students.pdfIn PDF document text
    • https://vikumufum.weebly.com/uploads/1/3/1/3/131398575/guzawovisagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_602bdeef4ab10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5ffbe5b00cf02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_fafe9e7aafdf4d39a65c41f982848f6f.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_41430df74f8042739ed43ae9b346a666.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_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 5556 bytes
SHA-256: 47360a1077dbae1ab8692edc58810c55c11b5faf85bd60c60a764491dd63a8db
font_01_sfnt_off00011313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11313 10572 bytes
SHA-256: 59d7f5a7a58823e28281af411047506f376c33dd3a014871cf64b777bfafb94e