Malicious PDF — malware analysis report

Static analysis result for SHA-256 59124bc290482f0d…

MALICIOUS

PDF

73.1 KB Created: 2021-09-18 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b25fe337b1c84ac965984b2d3c43f2a2 SHA-1: 0f48ad3d97504e75e6f15d73630fedb45c6fbc65 SHA-256: 59124bc290482f0dd28968a485fac5d7201ffb67f9d26b407adaac685fe653b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to multiple distinct, potentially disposable hosts. While no scripts were explicitly extracted, the presence of numerous embedded URLs points towards an attempt to redirect users to malicious sites, possibly for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://lederstuhl-shop.de/ckfinder/userfiles/files/supipofopivafonerepagute.pdf In PDF document text
    • https://dpt-mh.com/uploads/news/files/kosaz.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/41070039824.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/32632100222.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/29980261346.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140ffa2b0844---90661515976.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/46952868873.pdfIn PDF document text
    • http://szm.hu/userfiles/file/77904611128.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/mepodinevipo.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/doxaf.pdfIn PDF document text
    • https://uangraja.com/contents/files/kefif.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210918105204.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/64718814762.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/54373176999.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/jukunofoga.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/dojifexaxovivokeno.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/55680002016.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/vesalarafexakot.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/97053852857.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/79522288812.pdfIn PDF document text
    • https://producto.works/userfiles/file/836176366.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/jefoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=music+apk+androidPDF 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_off0000bc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 10416 bytes
SHA-256: ae870fc13e8e2541a8376195ab0c7edcb7dfb6a19e807a8ddc42ae9545eabbc9
font_02_sfnt_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 16676 bytes
SHA-256: 2b3e56aa6f7b94a0644c8a65accb55fe5eaca851d257e24c76a78a2ec0a6ef08

Open this report in the interactive analyzer, or submit your own file for analysis.