Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9220c2265a4221…

MALICIOUS

PDF

78.2 KB Created: 2021-03-18 16:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4903ffc29c91c0ce417816be7430e10 SHA-1: d72a7eb2473489afa1304dc0b6d2bf795e450af0 SHA-256: 4c9220c2265a4221e21df54089d73009ffdacbb50a05f4bab8abc567e0feb930
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or a distribution point for further malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to manipulate search engine results or redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=myriad+pro+black+condensed+font
    • https://cdn.sqhk.co/bojojiweg/aNij6jh/army_builder_app_40k.pdf
    • http://jedusajinud.mygamesonline.org/history_of_greek_language.pdf
    • https://topazezinin.weebly.com/uploads/1/3/0/9/130969714/cd126e68f58dd.pdf
    • http://nebofimanigi.sportsontheweb.net/external_hard_drives_are_used_primarily_to_complement_an_internal_hard_disk._true_false.pdf
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/vanikova-texamagar-putifelexoza-nizufokok.pdf
    • http://gojawufeki.getenjoyment.net/white_fang_1991_full_movie_youtube.pdf
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/rizugajofasim-wuzikifukemojuk-zegamul-nugamudodiganu.pdf
    • https://cdn-cms.f-static.net/uploads/4452389/normal_6009c4938c9aa.pdf
    • http://xufelaketodo.getenjoyment.net/piriformis_syndrome_treatment_for_runners.pdf
    • https://static.s123-cdn-static.com/uploads/4403952/normal_5ff13f511744f.pdf
    • https://cdn.sqhk.co/xevowuto/jjhc7id/rovidovajepufezixajaminub.pdf
    • https://xatodibe.weebly.com/uploads/1/3/5/9/135966399/9c0dff3395cf8.pdf
    • https://cdn.sqhk.co/popaxutu/jehchgZ/home_design_photo_hd.pdf
    • https://static.s123-cdn-static.com/uploads/4412762/normal_5ff85bbc9063e.pdf
    • https://cdn-cms.f-static.net/uploads/4409799/normal_6048e68f0d1af.pdf
    • https://cdn-cms.f-static.net/uploads/4473638/normal_604b28cfc3672.pdf
    • https://pegojuzifaxoda.weebly.com/uploads/1/3/5/3/135309499/8155231.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6f4572e1-37eb-494d-95bd-80f5f409e805/does_fine_mean_ok.pdf
    • https://uploads.strikinglycdn.com/files/83bd4741-29cb-48d1-b8a1-d2f9feb73cb0/30107312250.pdf
    • https://uploads.strikinglycdn.com/files/7065c787-1a11-497d-8800-cdf7dbd5f54e/getanafavis.pdf
    • https://uploads.strikinglycdn.com/files/e7da0648-317b-48b3-8e15-845f604f6cf6/35626769493.pdf
    • https://uploads.strikinglycdn.com/files/77097f5b-8e50-415c-82ba-f8c168f6ad1c/5678839546.pdf
    • https://uploads.strikinglycdn.com/files/bc1adaa7-1b4d-45c6-96b7-fdcb8cfd7791/sony_str-dh750_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/b9dbc994-9664-49f3-bd3e-1319a2310358/sharepoint_designer_2013_tutorial_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/fc326325-60b8-4185-a103-abcfc21ddd9b/blender_2.78_tutorial_ita.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_off0000ec85.bin
11e3e85311166474232264237d9f3a58ed84d4b4c8fb64b5445fe2ee45466898		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 5460 bytes
font_01_sfnt_off0000ff36.bin
04560d0d4de85499586fb5f68f0ec5231db83e53202cec23cdd5bc6e56babd51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF36 16516 bytes

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