Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6722ab64782bcf…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 09:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f52bb4aa4eadbde1bb7f932ae0260d82 SHA-1: b6d7ef87ce1e864dd8b19afa138554d8021a553d SHA-256: 3e6722ab64782bcff1daa52ae13de4c4fc55749101d64434860262df8e0adacb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting characteristics of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the nature of the link farm indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=asp.net+mvc+file+upload+multiple PDF link annotation
    • http://fasoxuxesatilu.sportsontheweb.net/facebook_business_model.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/jdgg2gi/93473517132.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/nR2gfjd/zombie_city_survival_mod_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374983/normal_5fec1734ab727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6042ef5f2fdcd.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/95101811267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388422/normal_5fccb7f496ee2.pdfIn PDF document text
    • http://jukejed.mypressonline.com/after_effects_shortcuts_windows.pdfIn PDF document text
    • http://afracheat3.xyz/nadaxetumasoridodusepgtd0.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/51083480979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_6042073e3d102.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5ff0eabe4f018.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/UjgjbYl/one_talk_customer_support.pdfIn PDF document text
    • http://astropsychology.site/couture_sewing_techniques_by_claire_b._shaeffercef6n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_174a481fd5d84a89a9c6cd41d90b479d.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_43ff6338e37142399b9eff5ceb072bb2.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_0b637d250b974f7cb3ce586faca80230.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_17555377f6294fc7802dfe571edc19bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/47778065543.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/flannelette_sheets_small_double.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/parrot_ck3100_update_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 5168 bytes
SHA-256: 1c78d161361b3a15a8b3b213b7f2e332e2be3b92341e0941e3b0688bf650138a
font_01_sfnt_off00010036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 12148 bytes
SHA-256: 56f27c4514feab22f595f2e224d37497eb599692aee7722b85b635b0fb1e7cc1
font_02_sfnt_off000129b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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