Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c9c08558e042ad…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 21:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1da6cac72a33660aee423526afc6442a SHA-1: 14daccb3334b10d9a6e4e7c4e241f428ffd5d438 SHA-256: 15c9c08558e042ad9fb92dcdee0c1cf885627205d8e959072b43c647e78d5e7b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many pointing to disposable hosting and configured as a link farm, suggesting a phishing or malware distribution lure. The presence of a password-protected archive lure heuristic indicates the document is designed to trick users into believing they need a password to access an archive, likely to bypass gateway scanning. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://shopinhome.com/ci/userfiles/files/51401795362.pdf In PDF document text
    • http://reliancefla.com/admin/images/file/fifur.pdfIn PDF document text
    • http://dbmotorbrokers.com/userfiles/file/41328449686.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/fevesusuvepowotuxonoku.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/gatunipolovuzuxe.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/kusaruvaka.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/pofuja.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/41474740720.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/wowifulewurur.pdfIn PDF document text
    • https://moolans.com/uploads/files/39707795034.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/7953529884.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/67001853893.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be087b924a---renuzot.pdfPDF link annotation
    • http://benthanhsgfarm.net/images/uploads/files/40815682977.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/75008691026.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/69613700983.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109180531475682.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edadeeb777---21324320506.pdfIn PDF document text
    • https://egca.fr/userfiles/file/muvedotiruvenef.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/69456483114.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/forebufabisa.pdfIn PDF document text
    • http://sun-tes.ru/files/file/bikojuba.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/ribejuzozobidiwelelonaxij.pdfIn PDF document text
    • http://melabo.com/upload/files/11469913780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=jenkins+android+buildPDF 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_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 18132 bytes
SHA-256: 9bf93b19d3bbce4ee151269048cbc9b689d8f335f8f4e290bffe1f6b16517273
font_01_sfnt_off00010840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 10464 bytes
SHA-256: 4cd0f90a6872359d62a71a525bcccfc183cdc6907031394e0b0c01676ffa2c8a
font_02_sfnt_off00012015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12015 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1