Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d12adb0220d3e1c…

MALICIOUS

PDF

82.0 KB Created: 2021-09-13 08:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 16f96a1be1ded35621a3210e9ba4db2c SHA-1: eca1119201fdbbd9745857040cf1cacdc48d406d SHA-256: 1d12adb0220d3e1c21108df4c35aaa65d230b25a5044d5062cc7db95120172f2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=gallery+doctor+android PDF link annotation
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/54643112968.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/rekorusukawuvuwudavol.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/79260823858.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/xitiben.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/wuwulazafiwonamu.pdfIn PDF document text
    • http://llux.vn/uploads/files/wozebadaxitenagomoka.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/286702117.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/25576290696.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/valerawukelal.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210903034734.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/92137818077.pdfIn PDF document text
    • http://ozora.schaffsen.com/contents/file/gefali.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161365d3864d75---zabawak.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613176076127b---53895915034.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/30214843084.pdfIn PDF document text
    • http://state-lithium.com/upload/files/64308510712.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/88595844515.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/25617711647.pdfIn PDF document text
    • http://szhlfz.net/upload/8373150718.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613a07f04c110---tusanazosulezaganika.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/marelu.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/67032240612.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/93712919235.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_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 19472 bytes
SHA-256: 1914d9910f530bd6b57c7704c2860e779b54215c4fa4b9bcb342d1dcca70a1a4
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 10348 bytes
SHA-256: 6a5de1afe446a8a8c8e39fa66e59d06f5c290e09d5c9d6a22877d3736fbb5652
font_02_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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