Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2733df71152843…

MALICIOUS

PDF

83.0 KB Created: 2021-09-20 02:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c0a97176109bf5868e662d75874466d SHA-1: a16b8fd2ff203a02eb00607fde8d9d52ed968724 SHA-256: fe2733df71152843a108bbcf542cb65b5fce87e1700947c191f9f0e2db13ce2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a link farm on disposable hosting, as identified by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, suggests a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cablexconsulting.com/Upload/file/95145368436.pdf In PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/83727077884.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/46296496715.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/34766705808.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/22344446750.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/zekitu.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/goxakexevimureketewug.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/japolaxefiziwola.pdfIn PDF document text
    • https://promise-land.com/upload/file/99882873715.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/kiwijavufakonameden.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/11181363371.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd877bda59---69431229929.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/digonokasafujigefi.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/98269280630.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/69817147808.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/goloropepoxunirosebiwo.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/xidomibalujupoworeme.pdfIn PDF document text
    • http://prompol.com/media/file/dilitiwop.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614223366da30---xibopamijami.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/53167897620.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/wepawovomonag.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/winovaparebekifomafetukep.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/zudubirumenizosuwadaku.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/11513518965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=best+android+scheduling+appPDF 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_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 10948 bytes
SHA-256: 282765110a2e84726761810645eb0174a5aab094c214b07bb6e59c8ffe027128
font_01_sfnt_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 17288 bytes
SHA-256: 34528257485065c435cb52d27fe859d93276e1b4cca0cfa9e92792c4811025d9

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