Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3d2aafecbeb061…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 16:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 73596d414df813a38e3819675a800b4a SHA-1: f9d498c37f0eeabd0e312e5413b1a588dab983f3 SHA-256: ea3d2aafecbeb0617d97f785626f3daa7dc050e616f9506f94e782cbeee5ae3d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded links, many pointing to unknown domains, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to exploit users via link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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 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://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/71057529082.pdf In PDF document text
    • http://travel-door.com/userfiles/file/81978637457.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/161413d04ed181---bimefonulazoded.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/19604313718.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/9345415349.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2540171130.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/bosowulazadir.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/17687020130.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/metituwof.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161417596c5c0f---lidixesix.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/tifanawilavesageguz.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/naxeverodagavovadise.pdfIn PDF document text
    • http://potlista.com/file/files/71078953170.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/jixegaxibatexigit.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614080f95f5d6---89698123843.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/jowisotojuvimam.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/27796391329.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/30333895207.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/niwipowozigilanufexunofib.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/13413099598.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210917_113C446BC922D25B.pdfIn PDF document text
    • https://agriturismoilcolle.org/userfiles/file/11332323705.pdfIn PDF document text
    • http://indel.sk/userfiles/file/xefejoveroxil.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/69862244745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=venom+2+let+there+be+carnage+full+moviePDF 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_off0000b09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09A 11012 bytes
SHA-256: d3b1195a831aaa4ec99398dd7a46d29ff1571dc89a8a21169ae0ab2e0fba1e1d
font_01_sfnt_off0000ca15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE227 16368 bytes
SHA-256: e5199dd0bc6abf6bc47b15fef1c2a19ea575b29ae198b2c28fd9e253daf1bee0