Malicious PDF — malware analysis report

Static analysis result for SHA-256 58656f505b91650e…

MALICIOUS

PDF

81.1 KB Created: 2021-03-16 18:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 89772a06e65e3530944d1ab1376cc85d SHA-1: 7e428fc90fd2282a3a1bc2176fe8842faec2531d SHA-256: 58656f505b91650e5e34687f811958d8041dbb18c19a8bfdc82f9f958d6e105e
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs and the overall structure point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://gimoguvi.ru/strik?utm_term=how+to+connect+bluetooth+to+big+blue+speaker PDF link annotation
    • https://cdn.sqhk.co/gogojiranat/QEhfj1E/biwabiwelananut.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/palagulimosili-xolotasomo.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/Jgihbhe/my._cnf_location_windows_server.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/hbhaVja/refafisumiga.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/pobagijukofewifevofi.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/86453316799.pdfIn PDF document text
    • https://zipelademijup.weebly.com/uploads/1/3/4/0/134017001/61b22f2d9.pdfIn PDF document text
    • https://bitepurumuxuz.weebly.com/uploads/1/3/1/3/131378930/952969241.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/fire_and_ice_melrose_arch_buffet_menu.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/77916794989.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/gumebawow.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/pdf_annotation_in_android.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/humayun_ahmed_book.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/jivazezaraxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_dfcfdb5c93404f118826bcccd1df620a.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_e41ca65548ed4bbd927c7586bb1803a8.pdf?index=trueIn PDF document text
    • http://sanojepenot.onlinewebshop.net/jumepoto.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/pogutiwukolisukasebifased.pdfIn PDF document text
    • http://sefenepisepaje.rf.gd/claiming_of_sleeping_beauty_excerpt.pdfIn PDF document text
    • http://romepasuv.myartsonline.com/watamimomepebenoz.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_06632239dc7e496b92187fceffcc104c.pdf?index=trueIn PDF document text
    • http://xafafomuripag.epizy.com/mandala_stencil_template_free.pdfIn PDF document text
    • http://xawosote.epizy.com/gepagurafojuw.pdfIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_af93d81dd1d247838b0de71ad0d7757f.pdf?index=trueIn PDF document text
    • http://laposul.rf.gd/android_version_device_percentage.pdfIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_5c55de64062746e5baa5f80b56bb81d0.pdf?index=trueIn 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_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 5452 bytes
SHA-256: 52bdf17d8448a7597f5924e30343d5c2e3885e258d5c12d96289ea9eb17ef96c
font_01_sfnt_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 10780 bytes
SHA-256: 9abafa6b59997a8868148413ed76adc1b0f93d7d1eb9be957f2dc1b36e71df93