Malicious PDF — malware analysis report

Static analysis result for SHA-256 185965ef0772abb9…

MALICIOUS

PDF

91.1 KB Created: 2021-02-21 10:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b53ad8b0f5ba848438efc5e63ceebd77 SHA-1: b2c82fe8cbfe234c8ca36b05f6222992c42480f6 SHA-256: 185965ef0772abb9bb61d88ff50b368eb8a27caea3168620681d8e912deedf58
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host a high volume of potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+sketch+using+pencil In PDF document text
    • https://cdn.sqhk.co/bikegola/6iajnB0/whatsapp_status_video_download_2020_mirchi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_60306e107b477.pdfIn PDF document text
    • https://sajozigita.weebly.com/uploads/1/3/0/8/130814351/5049556.pdfIn PDF document text
    • https://kixipebirivevex.weebly.com/uploads/1/3/0/7/130739750/4044972.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/a16a06.pdfIn PDF document text
    • https://raxipova.weebly.com/uploads/1/3/4/2/134234678/zafixuwirinelaj.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/bavanulok.pdfIn PDF document text
    • https://namutaborizelo.weebly.com/uploads/1/3/4/7/134766338/2692519.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/9hjhWif/ronejabotikuwufezikizajep.pdfIn PDF document text
    • https://donagifiwududo.weebly.com/uploads/1/3/3/9/133985641/takavogexiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_5fdac76e18114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_601fda06e4dd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://torexogisodejez.epizy.com/meteo_casinalbo_di_formigine.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/vusigutexovokifuluma.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/adobe_illustrator_draw_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/27553913938.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/fallout_3_perks_guide.pdfIn PDF document text
    • http://tobezizasatixib.epizy.com/oh_danny_boy_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/birleik_fiiller_konu_anlatm.pdfIn PDF document text
    • http://sidajewaset.epizy.com/caramel_baby_and_child_size_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 5008 bytes
SHA-256: 3f38473904cac8376ef0f4113821ce7c06ce64839f0b203a694ab4f85d08cb2c
font_01_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 12328 bytes
SHA-256: c2e236d7600860756022bef725f5bbcc6f5fe89bdf8763ac36ac4d540665cbf8
font_02_sfnt_off00014986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14986 16188 bytes
SHA-256: ac331ff209e496a545000daa6c22a418664ce8bb09dd9fd1314a38219ce2e6a2

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