Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c5bb2bb20c6c29…

MALICIOUS

PDF

83.4 KB Created: 2021-05-02 17:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15657157b7e5c1f73175c95452c77193 SHA-1: 762c4022c95683f2d3233cc30071a956b6c89420 SHA-256: 67c5bb2bb20c6c2947877a4bfda727a6f41d67c54d09c4cd02ebdf600df7350f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to external content, likely for malicious purposes such as credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=mini+dvi+vs+mini+displayport
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/5843006.pdf
    • http://romakipojaxu.mygamesonline.org/rategofugadam.pdf
    • http://lorewipa.scienceontheweb.net/mensa_practice_test_iq_score.pdf
    • https://cdn.sqhk.co/rarukaboz/hjlrA2x/reebok_zigtech_football_referee_shoes.pdf
    • https://kotutoxegaru.weebly.com/uploads/1/3/2/6/132695780/3103004.pdf
    • https://cdn.sqhk.co/fakineduxafe/Jhihhii/apocalypse_cow_simpsons.pdf
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/zirumumifa_degudexagitavuv_toxoj.pdf
    • https://cdn.sqhk.co/retobumoki/gOgjzYN/carriage_house_plans_3_car.pdf
    • https://cdn.sqhk.co/vamosopon/ih2C979/cut_florida_off_gif.pdf
    • https://cdn.sqhk.co/mibajufaneja/cjibhuO/beat_the_boss_3_online.pdf
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/2fda5476b1c333d.pdf
    • https://cdn.sqhk.co/goxupolofodi/jeNMghe/builder_games_like_fortnite.pdf
    • https://mixudepira.weebly.com/uploads/1/3/4/3/134379104/5304428.pdf
    • http://tanolugulutewu.medianewsonline.com/13272795278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xutenujute.myartsonline.com/zezedebeb.pdf
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_feab880e0edf489fb5c3a54858a1eab9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/463f5219-9493-4f33-8ff5-e994b59d1663/wukifo.pdf
    • https://uploads.strikinglycdn.com/files/f4ce17a4-a0e4-4e53-b438-c7ec316f0c63/97731311339.pdf
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_6fc92d2aca6942e1a10f2969ac43ce41.pdf?index=true
    • https://b760d8db-9746-4821-aa2b-94c9f806d328.filesusr.com/ugd/26ce45_bdf72dc5b9084e5db879220ffe1193ec.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c29bc719-560e-4d1b-81ad-0dc8f6e1c121/thermador_range_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f899.bin
691784235d408c5daa16765a78a140fa71b201e97fe97d09d9c68fd33d32e59e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 4944 bytes
font_01_sfnt_off0001094d.bin
b30e4e32ca844ee7fb80d1970db5d14d736bad58ff5c50139574cf463e34c24f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 12420 bytes
font_02_sfnt_off00013076.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13076 4324 bytes

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