Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea80f0692cdca706…

MALICIOUS

PDF

82.5 KB Created: 2021-09-15 11:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ce342e71bd690e86d26571af417545e0 SHA-1: 547fa75926ff7aca5e412fa6c1f78da7ba54c082 SHA-256: ea80f0692cdca706ad7ae908d4c15147a25b92e1bacd205f8d6b010dd98ca294
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high likelihood of malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://esipro.lu/userfiles/file/81814177087.pdf In PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/22463977.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/31478251993.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/18253937647.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/61691054274.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/sexekego.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a409b567fd---vosifigapabijasaroda.pdfIn PDF document text
    • http://vuason.vn/upload/files/pilizizejo.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/77010475361.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/zoxoriwesubotezu.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/sewagavako.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/mujozegujejikitusazefow.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/nakaz.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/resedo.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/nepajetogopojavofazo.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/xanutekezokofebaguninona.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/81460803482.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=malheureusement+le+processus+android+process+acore+s+est+arr%C3%AAt%C3%A9PDF 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_off0000da75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 11188 bytes
SHA-256: 5d5d3fdc2515702af6b5b90f0d98999f9a53e72cdbd9fa19ca4014f8ea12087d
font_02_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 18000 bytes
SHA-256: 5c9c9264f9243930ab765ee6b5604f10586918137d420ccd651adcd26260359d

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