Malicious PDF — malware analysis report

Static analysis result for SHA-256 297f789f888c2890…

MALICIOUS

PDF

138.5 KB Created: 2021-05-27 10:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d2ea773f14493fb12d14e49bb8db8906 SHA-1: d31e2b2c8655d28c96578b7ade6b2bf7d80b4fd7 SHA-256: 297f789f888c28905e1ffa6fd8ac6f5a63797a8e27de69e819caae33acea4999
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common tactic to download and execute further malicious content. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=windows+server+2008+r2+standard+sp1+download+iso PDF link annotation
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/katovamewo_nuloval_vobesu.pdfIn PDF document text
    • https://volikupiwete.weebly.com/uploads/1/3/4/6/134676366/pepatabujexej.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/5810943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_6005a76fb3df8.pdfIn PDF document text
    • https://todusoxi.weebly.com/uploads/1/3/3/9/133999566/xovelukopef-roxonawusevudu-pajuzozedubom-zidewas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_5fe8eb24f0e5b.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/silasorevu.pdfIn PDF document text
    • https://turezizudowan.weebly.com/uploads/1/3/1/6/131606253/608f5.pdfIn PDF document text
    • https://padixegidenu.weebly.com/uploads/1/3/1/1/131164435/lutexaxijumudelu.pdfIn PDF document text
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/8b9af582d8fb.pdfIn PDF document text
    • https://xapabareduvan.weebly.com/uploads/1/3/4/3/134395213/xisubakes.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/71418.pdfIn PDF document text
    • https://jelisewisu.weebly.com/uploads/1/3/1/4/131410299/af84570e1.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/6074722.pdfIn PDF document text
    • https://jobovivubip.weebly.com/uploads/1/3/5/3/135392816/32f4997b62.pdfIn PDF document text
    • https://minetoleletumu.weebly.com/uploads/1/3/4/7/134767865/fb8ee4be5d6fb2b.pdfIn PDF document text
    • https://xanojamazifedim.weebly.com/uploads/1/3/5/3/135323589/4585432.pdfIn PDF document text
    • https://jigotofobab.weebly.com/uploads/1/3/5/3/135300724/jotezivufig-bizazoruk-vuxisulapig.pdfIn PDF document text
    • https://rujogapojepon.weebly.com/uploads/1/3/4/5/134597846/4446265.pdfIn PDF document text
    • https://giruveme.weebly.com/uploads/1/3/4/4/134480937/4493015.pdfIn PDF document text
    • https://kelukija.weebly.com/uploads/1/3/4/3/134337818/eff456c.pdfIn PDF document text
    • https://vuzirokisex.weebly.com/uploads/1/3/4/5/134576988/5cefdd0.pdfIn PDF document text
    • https://nuxowisa.weebly.com/uploads/1/3/4/0/134018218/1944243.pdfIn PDF document text
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/7657690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001a35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A35E 18884 bytes
SHA-256: b26f2b24a2d651dfb3cff6de1737cb32b6548d4af1f7035daed15277d9e04fd2
font_01_sfnt_off0001ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DED4 5640 bytes
SHA-256: a7a57df274197cd3c30a38376c552056012569a512a4afe4e6124f8549120d5d
font_02_sfnt_off0001f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F237 11140 bytes
SHA-256: cd4f73046c15a8be3c267cb4c8df4a5fa1698e27663c454d50fb71e5cd847a88