Malicious PDF — malware analysis report

Static analysis result for SHA-256 14daa9b221090091…

MALICIOUS

PDF

70.0 KB Created: 2021-04-17 16:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ea9c4573a28163454e001d34c04437af SHA-1: 8ac394d0e486e5d8ce8777a19d1b6dc012900504 SHA-256: 14daa9b22109009177cae983094ca748a9a4819aaa738877050656ce112dbeda
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=instructions+for+cuisinart+automatic+grind+and+brew+thermal PDF link annotation
    • http://wumewil.sportsontheweb.net/7176095761.pdfIn PDF document text
    • https://fafiwopadatomag.weebly.com/uploads/1/3/5/3/135326984/ruvibawomel.pdfIn PDF document text
    • https://badikodaxalele.weebly.com/uploads/1/3/4/6/134698448/kosovinored_pedatexobepezo_xokoxomuwon.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/totobosarexi-dinogefemumoge.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/7544668.pdfIn PDF document text
    • http://christmas-gift.ru/42445365878796vk.pdfIn PDF document text
    • http://gazozasi.scienceontheweb.net/19396746914.pdfIn PDF document text
    • https://kasexesupa.weebly.com/uploads/1/3/1/4/131437862/7526524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481552/normal_60172760f1002.pdfIn PDF document text
    • http://swiss-gear-top.xyz/how_to_reset_samsung_soundbar_remoteybwle.pdfIn PDF document text
    • http://polfact.site/polycom_soundstation_2_power_adapter1pu4i.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/austin_kleon_keep_going_download.pdfIn PDF document text
    • http://xruhdfo.site/rozurzgldh.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/5531275.pdfIn PDF document text
    • http://fortysgjdk.fun/c_programming_a_modern_approach_by_k.n._king1ndst.pdfIn PDF document text
    • https://rowimunikak.weebly.com/uploads/1/3/5/3/135346477/fujora-gupunujikinom.pdfIn PDF document text
    • https://vososodimeditu.weebly.com/uploads/1/3/4/5/134599865/237fa39a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_603184f6dfcd2.pdfIn PDF document text
    • http://baranaydin.org/mikigiwisujubussinr9.pdfIn PDF document text
    • https://vonojatu.weebly.com/uploads/1/3/4/7/134711894/sudapuki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazaburifug.myartsonline.com/amino_acid_analyser.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_off0000d11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11B 5604 bytes
SHA-256: 7967b83475781e10573479015169817fda32d1d4859b05b8c0495fb57492848a
font_01_sfnt_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 10556 bytes
SHA-256: 3ed5a57c0ddc3f2ddb0db3048344e1c8c8931f971635384dd412813466ff12cb