Malicious PDF — malware analysis report

Static analysis result for SHA-256 e972bfcf5de018ef…

MALICIOUS

PDF

95.7 KB Created: 2021-04-06 17:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d4fb7c0d4cfb0f8877d88bf68b8d744a SHA-1: 16ae6def33a925c0c233cc5fcae23cefe43f6f0a SHA-256: e972bfcf5de018ef7e148913efd341b6383818f537228a824b8bce282390a8b3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with one prominent URL leading to a link farm designed to redirect users, likely for malicious purposes. The document body, though heavily obfuscated, contains keywords related to 'Minecraft pc free no java', suggesting a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://xajibur.ru/123?utm_term=minecraft+pc++free+no+java PDF link annotation
    • http://shoop-ff.ru/best_gaming_wallpapers_hd_download_for_pc623ol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_604de2c144740.pdfIn PDF document text
    • http://itayoga.space/980532840538imt2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_6017620651cf2.pdfIn PDF document text
    • http://mugedly.xyz/54026605094gui2s.pdfIn PDF document text
    • http://private-channel.site/65614837057rvuis.pdfIn PDF document text
    • http://nukels.xyz/norcold_n611_replacement_fridge15p2m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fc74ac8b2ce6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_6028e5df49e45.pdfIn PDF document text
    • http://wide-do.top/tomaxinenuduzalobejakak1u5.pdfIn PDF document text
    • http://powezikunuzumi.iblogger.org/79639395383.pdfIn PDF document text
    • http://allroadkamchatka.ru/757778004487zr64.pdfIn PDF document text
    • http://pusikoxelumide.iblogger.org/haminastu_full_song.pdfIn PDF document text
    • http://idealica-italy.site/top_scorer_premier_league_2020_todayyb9dc.pdfIn PDF document text
    • http://argo-tourism.com/paintball_pistols_under_100_dollarsmkz21.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/51444cad-a7c1-4a7e-90b3-e6e843098119/vojebod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93eb751e-c271-434c-90e3-a05f2f345366/82780004805.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bebapoxurajeretadopudu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/44434237814.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/kepodokojifonejurowotetez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6bad07-7ff4-464f-bc4b-d413d9d5c318/36036042300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b540b0-bb43-4ef6-9b34-165fd9f8097b/mitilidavelogejunukole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9b941e-b316-4698-985d-fde873300be2/newoxiwikeguniwokerokob.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DF 4940 bytes
SHA-256: bda62f7db2ee0612e9488ce73c78c04efe50bf73f8abe32fd8caf163bf21fa44
font_01_sfnt_off00014ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ADA 11352 bytes
SHA-256: ea542384b8532c55fa0cf1406b48f319fa3ef0179aee01ae46f075cf2d50e5ef

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