Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f1db64a1c01dc2…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 16:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 52f2eed8f4ae36e02a77f4230bb5f81a SHA-1: d4310c65cb3abbde19b688a47a5e79a1086b3749 SHA-256: 96f1db64a1c01dc2847ea3b4348af5cfba4ff6e5ee0aad09bf790085a8e8a69f
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 0.9977

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://philabc.ru/uplcv?utm_term=methods+of+effective+communication+pdf PDF link annotation
    • http://intertravel.hu/_user/file/10424305288.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/tujugodanixolurakevumijuk.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1f8f303db---49363060349.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/noseguxa.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/856cbe2c9eb1037392eb9b0bff75bf1b/bakiveburotupojave.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/zejef.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/bajekaragegukoweretiki.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/90988972987.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/welutuwiwoz.pdfIn PDF document text
    • http://espokebar.com/uploads/files/borazafipuwoxovepimumo.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/42887966200.pdfIn PDF document text
    • https://beaszemin.com/files/79447825538.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/mexiko.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/25114614302.pdfIn PDF document text
    • http://videlec.be/ressource/file/48755074954.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/83089371357.pdfIn PDF document text
    • http://air-ned.com/uploads/files/17231589944.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/56292916868.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/14055900258.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/34249840118.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/55076773937.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/45709803670.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/neramubujawawo.pdfIn PDF document text
    • 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_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 17536 bytes
SHA-256: 0317c58a7043c604160c2ecbaad9ce302ac20d087b5e078b222c0360f4f2e66a
font_01_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001263b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 10900 bytes
SHA-256: ba5496ab9ed178022156fec0548209b39b1888d82fa3d7a71a7aab8c973ddc25

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