Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0c5927e5ca3d20…

MALICIOUS

PDF

69.5 KB Created: 2021-09-14 16:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cc71946bb9476f598c277407dd09dc6d SHA-1: d49d2081e3a7ed41cd06b8906e4aa2a2e8a5bf25 SHA-256: 1d0c5927e5ca3d20c63e5e895f96aa1f906537bd7e5ca0b7c9dbe0cbe41d4851
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common technique for phishing or distributing malware. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://abogadosaguilar.com/ckfinder/userfiles/files/98507573998.pdf In PDF document text
    • http://twgo8.com/uploads/base/files/202109112209149479.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/bupuxurazijovivojubinera.pdfIn PDF document text
    • http://trivio.it/userfiles/files/sitaza.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/titig.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/pototadosetibugovemo.pdfIn PDF document text
    • http://prograsifkalip.com/files/98378668784.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/67264057249.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/gidijuzeruvunemorivaw.pdfIn PDF document text
    • https://sambelteri.com/contents/files/15787824479.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/72297156239.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/68909240.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c706514e3---vutugepeligo.pdfIn PDF document text
    • http://e-menu.hu/editor_up/sekebuzulurojasukanu.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210914/1753399408.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/nevasikovod.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/fegivuxujowa.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/50074963546.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/wumoligakezovo.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/bobasaxo.pdfIn PDF document text
    • http://prmakeup.com/Image/files/kekupotafoxaw.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/22660082951.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/27276996302.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/fesivedana.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/15312210008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=forge+of+empires+mod+menuPDF link annotation
    • 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://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_off0000b480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC92 14420 bytes
SHA-256: 1aef740283dadc05c35c3f0a303d3124be53edac95b9e3304374e928c1cd2cf1
font_02_sfnt_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 10612 bytes
SHA-256: 02e1079a14035cacd71fcd643f87e531eab9b528c9fea44544aca7a0a90fdcc9