Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab411dadaf2b615f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-11 02:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e6f772aac7598fe9b517e60e5ec037e2 SHA-1: 595094fb36cb27c1beed3756f48a50653beb9891 SHA-256: ab411dadaf2b615fc8e80f6aec4157024b471ac49cffccbca2d600759a135da2
186 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one pointing to a raw IP address, indicating a potential download source. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests the document's purpose is to trick the user into believing they need a password to access an archive, which is a common tactic for distributing malware. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://studiocommercialedelpiano.it/userfiles/files/femelis.pdf In PDF document text
    • https://miet.hu/kepek/26229554293.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/rukaxowoduzojitozur.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/37280302334.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/49082948192.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161346e206a8bc---wewemumujuv.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1630525762.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/mopowokiroweg.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/58660706114.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/87975765534.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/vizowatuj.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210910_AF4119330A209A0B.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/61449671191.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/35171904527.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/19196068939.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/wuviwabedefobi.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/59844547262.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210905103431599.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/271d5dfee77d44c0d70495d76492a68b/vigusijegaluzapavewete.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/72011691361.pdfIn PDF document text
    • https://actorconseil.com/files/file/70017574154.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd35266a93---48370608714.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=gta+5+download+for+ppsspp+highly+compressedPDF 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_off0000cec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC0 11440 bytes
SHA-256: e920854502e77f09c718ef85ce7c4b79db9cca0eaf68846eb38cf8e3ae3314a0
font_01_sfnt_off0000e989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE989 17168 bytes
SHA-256: c637a328783fffc48dbd1f556bbed48535da603cb12c637789ad47228ceb32bb
font_02_sfnt_off00011652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1