Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2cdc297852f96c…

MALICIOUS

PDF

68.8 KB Created: 2021-10-03 02:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e17a2b86bb7cba6b9e9084bc60272d27 SHA-1: f7f6885071391d00edf24fe9fc8ed8dd36234020 SHA-256: 1e2cdc297852f96c55e95c47e11b9b35f45251b0dbb9fbfc3a5140afe45256c4
146 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, a common phishing tactic to trick users into clicking on a hidden malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous embedded URLs, many pointing to suspicious domains, further support the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 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://savitaco.com/uploads/images/files/lepixinafogiredofogovixef.pdf In PDF document text
    • https://quatcongnghieput.com/uploads/files/36596434863.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/81164778091.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/93911046447.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/58259808291.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/fametapeku.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/zekajupevapasirofu.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/30262937225.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/67396980201.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/911f8951ddb8d7cc95a190469b17be03/10525819761.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/17477487363.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/bamizaba.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/39361261566.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/wulurukulowoneg.pdfIn PDF document text
    • http://ymmicro.com/files/files/92592389149.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/jesabilalamifolukepetaj.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/44499450636.pdfIn PDF document text
    • https://pr-dienst.ch/file/27993435480.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/vasowanoso.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/21370322841.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/44223628878.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/gifuvopedazar.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f313d1e6d9---dafej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=spanish+for+straightPDF 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_off0000b181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB181 14516 bytes
SHA-256: 6552ddee5d6a73ff6c63a5c849155e3be93643f246b79d6358bdfb3acf021a43
font_01_sfnt_off0000d5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 10536 bytes
SHA-256: 8b8b79b3c2166ebce5b0aa33753a0210c1de5c779dc461a8e7458829d9d96af4