Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dd5453b4143fcf…

MALICIOUS

PDF

78.3 KB Created: 2021-03-01 20:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: be42e122e9bd763a95620ae84c1e8546 SHA-1: fd024344f1b18357922773c0d17a6208129a826a SHA-256: 58dd5453b4143fcf74eb862d8943fddb22dff6ecccd48f38f6b5ca2a66e9d589
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external URLs pointing to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scam operations. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=how+do+you+make+someone+fall+back+in+love+with+you+again PDF link annotation
    • https://cdn.sqhk.co/kokojisip/hbhjGji/61536334035.pdfIn PDF document text
    • https://pupifino.weebly.com/uploads/1/3/0/7/130776741/5948858.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/68804611184.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/IqjaibE/fanatic_runner_multiplayer_subway_runner_games.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/jddjcii/6222437122.pdfIn PDF document text
    • https://tajerupabud.weebly.com/uploads/1/3/1/1/131164315/kusulakini_jusajowuroxi_lukugoni_ludirokefose.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/U7wcpkI/pop_star_fancy_dress_costumes_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/ghAuLhd/zofesivoga.pdfIn PDF document text
    • http://netopodimamo.mywebcommunity.org/42108697229.pdfIn PDF document text
    • https://supipujijasof.weebly.com/uploads/1/3/0/7/130739476/rumenigunabopa_girabopadur_pixakil_sedoja.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/76589185134.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/gepodafinutukomafap.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
    • http://jabejanaboz.atwebpages.com/50675636152.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/reformat_e_administrates_publike_ne_kosove.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/laraxetupupasutevewok.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/jadanubujude.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/97376677710.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/osmosis_worksheet_biology_answers.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_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 5640 bytes
SHA-256: f63792fcfc1b8179df6574c1bf9ea4b75ef454d1c222080f24822297918c8c6e
font_01_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 10588 bytes
SHA-256: 88ab06f1cbf4aee0f98ef3b0730d0b5689285215a12fe5877464f70f08c5c597
font_02_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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