Malicious PDF — malware analysis report

Static analysis result for SHA-256 c773297a0f8c5476…

MALICIOUS

PDF

96.9 KB Created: 2021-09-09 18:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 8192753af870c1e13cbc5c5574ad848e SHA-1: 5b552ecc4418dd92381655dae18b5cd8a7ed163c SHA-256: c773297a0f8c54765062389b41366e48290857fe3665dee90380ad9a3eaf75dc
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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=blackia+full+movie+download PDF link annotation
    • http://lnyuanzong.com/uploads/files/20210902191812.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/37398009834.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/36468362915.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/tomotilemedemavamalor.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/34918396390.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20030574819.pdfIn PDF document text
    • http://byecook.com/ckupload/files/rozevaparovunerabiw.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132b559d2b1a---larorakus.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/kujuvapuman.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/1413962454.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/82050026573.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/pojose.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/milidekaze.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2d55b403f---nijekikarudubogokizakem.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/miburixezekez.pdfIn PDF document text
    • http://selispin.com/calisma2/files/uploads/58644086435.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/kozewigodozizudaneligido.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/bolel.pdfIn PDF document text
    • https://sealskinz.ru/files/file/12429208700.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/kowuzokom.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/58503076679.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_off000117b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B3 10668 bytes
SHA-256: bcf0521b875cd89bfeffd248332ea9c303042ce34c2b2b18385a930012ced7f9
font_01_sfnt_off0001302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302E 17652 bytes
SHA-256: 130f1790d20b5661eadc8bab9034079a6c9e02f5c4b3fe6d92dbedfd967ec1f8
font_02_sfnt_off00015dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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