Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2a061d2b3b6538…

MALICIOUS

PDF

71.0 KB Created: 2021-09-29 13:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e11e12a9d153c1102870df6736a8975c SHA-1: b7b9d1454ddb0f38040f05a0b672e3668941f738 SHA-256: 1a2a061d2b3b6538e509f74804340b188c563c97b7222efe279022f621f2d5d3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, a common tactic for phishing and malware distribution. Several heuristics indicate this is a link farm designed to obscure the final destination, which is a PDF hosted on an IP address. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://fasson.vip/images/editor/files/98145437783.pdf In PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/90989375046.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/nebadodewu.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/92466737052.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/fisivuxamegaj.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/4824837799.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/fegovikiginuzuk.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/555327606.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/tusujilozexikapurupa.pdfPDF link annotation
    • https://aptitudeclass.com/ckfinder/userfiles/files/48766147353.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/18038923569.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/bopolapolafe.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210917_010217.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16142d091d4d7e---nipulufupanogarazorem.pdfIn PDF document text
    • https://expomediainc.com/upload/file/13754987835.pdfIn PDF document text
    • https://j26clean.com/upload/files/28050064529.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/14143864486.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/16503332368.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/duzuvop.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/futupubamejakalozirotud.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/mejerigerivibon.pdfIn PDF document text
    • https://processwork.archerhuang.com/ConImg/files/32065645472.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/58775221327.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/bewodusuzakuwijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=shadow+fight+2+download+titan+modPDF 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_off0000b2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DB 10684 bytes
SHA-256: 48eea78436969c20fa52ce90b13ceca092cd9dd9f3f6d33e3203346def6c9db1
font_01_sfnt_off0000cb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB08 16800 bytes
SHA-256: 99ad358a52826e7a0b7372df8cd30c21b3ee02eb5e30f83a433d1e8b4641d46e
font_02_sfnt_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1