Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed335cdfa1f5fdb…

MALICIOUS

PDF

83.9 KB Created: 2021-09-11 09:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 749044394cb4cd647de1f4ed5c74cd64 SHA-1: e68d8d5748727b0c7c31918e8ad69b0db291518b SHA-256: 0ed335cdfa1f5fdbabc62cc4027161d3b2a63c561bd26163adc2fa3d5b5bba1b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • 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://hygradeinsulators.com/images/uploads/file/daronajuduxok.pdf In PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9ae201cf0bd915bf56007fef82f339f4/83952122046.pdfIn PDF document text
    • https://airxps.com/userfiles/files/xuripubid.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/razuwenameliz.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/25304989943.pdfIn PDF document text
    • http://banquat.com/userfiles/files/43424233608.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/zariwakedovovumedovij.pdfIn PDF document text
    • https://ienter.bg/files/82256299238.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff82182b72---vozisutasiwaga.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/jovujetoworegatunes.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/zajazagarul.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/89898608956.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/75619810462.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/45738716424.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/63889824128.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/31709615141.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/wadorogijegodi.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210905_BAB2C8DB0B31493E.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/jupaxuxotom.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/71407840236.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/41406716263.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/zumexosa.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/44015697016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=shivaji+the+boss+in+tamilPDF 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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 17668 bytes
SHA-256: d45306e86d577804693f7636d452d0cf3b6688d30646962345f3fad16c973092
font_02_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 10684 bytes
SHA-256: ec201344fe211cfa9fa6a7014daf4dae65bb39ddbfcc971f363e96ec47916099

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