Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a06e5e34c9646c…

MALICIOUS

PDF

81.6 KB Created: 2021-09-14 03:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 45d52e366601ad305816632889c2f8c0 SHA-1: 293b6a3d334bfb6f0a0bc96ed4bd112d7affe804 SHA-256: d7a06e5e34c9646cb91cf768b3b2d5905870fa641ce6bc46fa5b694bbe4d9979
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://watosaphotography.com/app/webroot/userfiles/files/20210906_134316.pdf In PDF document text
    • http://polipadel.com/userfiles/file/84022421757.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/boxeri.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/desufulowokoxojivefi.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/dutagotagifum.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/rorovuvazabetapupatexe.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/60496492366.pdfIn PDF document text
    • https://pmms-online.com/assets/file/laniserep.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20219121352394869.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/bopuxa.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/milemigexogezilelav.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/76042472090.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/joxomos.pdfIn PDF document text
    • http://cudicio.it/images/file/woxuze.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/lebemilo.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210910/1930573589.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/22766690056.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb93d5b39f---safobolalubezefi.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210912114434.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/2826856867.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210913_A461A19351A0C47D.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/tadolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=natural+rubber+density+kg+m3PDF 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_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 18604 bytes
SHA-256: 2b296a51cf195dfc50528133f2c985ef21ba79b7d78aba233431f5bec63d9b9c
font_01_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBB 11064 bytes
SHA-256: b66189af23c6a1d4f0093124eb15c2978f41070a41f0cb1a9e09d4439d333173

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