Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c59b47075227bf1…

MALICIOUS

PDF

68.0 KB Created: 2021-09-25 01:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 67f67919c316fc1af95577f7130c2ca5 SHA-1: 6f030395c53f7c7f5b9b4f34374758b745ad7234 SHA-256: 7c59b47075227bf1de199b54be4b4958d5c38e308f4c724088a2f560f2e9730f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious content. The presence of external URI links and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://betonkeritesek.eu/Content/files/xufafubesufuxemutisudaku.pdf In PDF document text
    • https://annekienlen.fr/imagesfile/50868667339.pdfIn PDF document text
    • http://pedraferro.com/files/files/kezolajotidiwuvumuwarifax.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/xamavakebava.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/xilesenigelalopiralozet.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/96075181059.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1614121f5d1cda---21669134722.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/4160630079.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/91761166141.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/jotalanubulazogoxemisubid.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/zanepifotal.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/161429cb98b81d---temojogomasol.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/jajosusaseleborepav.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/xomudobenavedonog.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/sixixix.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/38193939479.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/269571883.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/a7b701b7472c41dfdc9ee120bcc13d96/zefagepigim.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/zafawugezumo.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/57765860293.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/kupuxoxux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=convert+pdf+to+kindle+book+formatPDF 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_off0000ac84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49B 10820 bytes
SHA-256: 0c39791d37f222bd74d5acdae328a05634fcd0b7093f29e7a70c75caaba0b568
font_02_sfnt_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 14872 bytes
SHA-256: 7885dbed8dba8e3a7d5750c9f3d5ade03bc3fbc0d5affbe0bd2640212705658a

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