Malicious PDF — malware analysis report

Static analysis result for SHA-256 f028747af579a4d7…

MALICIOUS

PDF

84.9 KB Created: 2021-03-13 21:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b035ccf9d75f14a7a73150ac751fe5b8 SHA-1: b357bdcb14d14977876e51d3f8a4917a998266d4 SHA-256: f028747af579a4d796e00abca7c0e4f02ecdd05afe8148e12d98967d65fb50e0
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting services, indicating a link farm designed to redirect users to malicious sites. Heuristics confirm the presence of malicious redirector links and a link farm, with one URL specifically flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=aqua+quest+guide+tarp+test In PDF document text
    • https://divevuke.weebly.com/uploads/1/3/3/9/133999966/8b6f216.pdfIn PDF document text
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/f71b69d0d8967.pdfIn PDF document text
    • http://pagujubemozakev.22web.org/44362989888.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/cba8f54dc.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/idfngfR/12986922277.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/jegijiq/falling_for_christmas_movie_download.pdfIn PDF document text
    • https://jekotufuwin.weebly.com/uploads/1/3/1/4/131406020/4432749.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jj2NijC/stickman_fighting_3d_crazy_games.pdfIn PDF document text
    • http://rivuxini.66ghz.com/defuduzumodinitubesefer.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/zewafamoresegir.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/f3e8e1f75.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/is_catch_me_if_you_can_leaving_netflix.pdfIn PDF document text
    • https://nulenedo.weebly.com/uploads/1/3/6/0/136084055/pinisuromiwuxa-nopikebol-domebojavubif-wetas.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/hahehjH/supezutivanusozufoxo.pdfIn PDF document text
    • https://ripegedabezigiz.weebly.com/uploads/1/3/2/6/132695689/6787524.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogefotatuledis.epizy.com/dupivawupefikawija.pdfIn PDF document text
    • http://bisobowezite.rf.gd/63848637665.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/la_iliada_completo_espaol.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_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 5208 bytes
SHA-256: 5804efe8f6e0f865154b7a53649d88d736cd45a086fbdfec5034ab444fbe493b
font_01_sfnt_off00012059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12059 11408 bytes
SHA-256: 4b1b63318f5392a5780b615091d4ff690a520bd5e3f960a5b42d3b008fc609df

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