Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad60bddde1d6969c…

MALICIOUS

PDF

68.2 KB Created: 2021-09-11 18:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 1cee77a920cf29f56fe849ddea4d9d08 SHA-1: 444011e9732f9388ee8a96020e45a4902feaa33c SHA-256: ad60bddde1d6969c121beb1cec73c069652ab16594bde972c767e9d6794c4893
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 0.9957

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://irlanc.ru/uplcv?utm_term=free+itunes+songs+download PDF link annotation
    • http://chipgene.com/image/files/20210903_081004.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613992f7002b1---buzibeg.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/judakotukus.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/43131651872.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/rewofikalog.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/17174854285.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/buxukavaboganenepetep.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/76006608696.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/zefegezazuwewebo.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/sofavugirobanijo.pdfIn PDF document text
    • http://4bx.pl/public/file/sufogigopisexezefazisazup.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/56011151249.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/24355933336.pdfIn PDF document text
    • https://csn-alliance.com/data/files/92662973942.pdfIn PDF document text
    • http://asv-solnice.cz/_files/file/15921569411.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/bokibimagavuredinigajes.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/47690557533.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/dinejemukepelob.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/sexejimanapofumejudob.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/5a611328631707608880b03658fb33c4/71241748975.pdfIn PDF document text
    • https://adikkedua.com/contents/files/sikesuxage.pdfIn PDF document text
    • https://forumsevens.com/images/file/99218775654.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/26827794082.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_off0000af01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC718 10588 bytes
SHA-256: ff1718ed061702061d48b6f2714bc34512295172ff59d75dd8c52f07a7a52314
font_02_sfnt_off0000df37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF37 14548 bytes
SHA-256: 2a22029ee6a991b511964cc4c7c461a2c5ba406425c557927c905a6855d612d9

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