Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ec09e5160731a8…

MALICIOUS

PDF

83.4 KB Created: 2021-09-12 12:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d7d098e84625826bb4cc04469e341304 SHA-1: c82756c2b8211ad449d1f8cf6a2ddb61dfaa0e36 SHA-256: 58ec09e5160731a8743e338267d3572191dc256a769a517f1a75dae8e7ba493a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to other PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to obscure malicious content or redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inarsindbari.org/uploads/wobenat.pdf In PDF document text
    • http://ailizia.com/userfiles/sikarejekasokobi.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/9992612550.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/39519219587.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109040926075308.pdfIn PDF document text
    • https://harom.ro/files/file/femekoduvup.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/89519908825.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/51512067233.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/35290774185.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d876859d5a---21111392524.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210905060848.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/bodirefilerope.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/lalexurol.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/bawozusedesizuferamigagel.pdfIn PDF document text
    • http://espwireless.net/uploads/file/42967138169.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/46745910389.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/notiwapebuvoxo.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/dabadebugunuli.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/fotiwifezuligawomekajid.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/95189440323.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/givewozesamaxilax.pdfIn PDF document text
    • http://bresky.cz/res/file/zunuzafabalabakaxulonu.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/74017446600.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/jegivejoxomegebanizusox.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/nelolumane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=esport+life+tycoon+apk+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_off0000e279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 10968 bytes
SHA-256: debc1124d9174d17d0c3f1a4d38c9b42662f0d3158e8ff33a106402ff79e8ce6
font_01_sfnt_off0000fbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11407 16944 bytes
SHA-256: 1ad2f485cfb1644d11a113d532e4ba4e43656095c080d31e993447346ce7a812

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