Malicious PDF — malware analysis report

Static analysis result for SHA-256 064d9cb7a1272416…

MALICIOUS

PDF

80.9 KB Created: 2021-09-16 00:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5a4ea8272b4aba847a57d3d2d95d8e8b SHA-1: 4db1e4a694abaa30192da18d16999f6738b95853 SHA-256: 064d9cb7a1272416bb14538698d68231e53c3ea12678885df3dbe3098609445e
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 0.9968

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://cructi.ru/uplcv?utm_term=how+to+remove+downloads+from+android+phone PDF link annotation
    • http://cathugo-catamarans.de/res/wysiwyg/file/sezis.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/3777959682.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/wesoxilunijuwi.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///66503492898.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/luwirenorupide.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/rewumoxowedafipobamekixom.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/litisovidisegasabojuv.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/35411548298.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210909_29B67C09B9347228.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/83379879622.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/mifek.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/fepogunew.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/15551221970.pdfIn PDF document text
    • http://gysanya.com/upload/file/210912181035096396lzddnujhzlvc.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/41100727921.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/dazami.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/depexugojum.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/44905720428.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/fetidijomag.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/fenaduralinobuvemut.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/migigoxuvaw.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/nuvakisirupekebenowij.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 10904 bytes
SHA-256: 82062b04cf8fc6dd3b018f9a8305f298eb723974cbb4526beba5fc2bb01a19d0
font_02_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 17952 bytes
SHA-256: 3b05d1a60ca25dedf30c35b4b99394b27fca491332f517989f87ab0c5ec96b32

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