Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cf28c7ccf1f09a…

MALICIOUS

PDF

70.1 KB Created: 2021-02-13 10:00:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ce4650dd29b04931638d265adc710379 SHA-1: 9985ae1b8f5e92158e428f2c115b5eea84832314 SHA-256: c2cf28c7ccf1f09a8167f259c9feaa82413102fb30c97093871c6a2608e5f775
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=zg+survival+mod+apk+1.2.20 PDF link annotation
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/9098990.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/f5hdji8/taming_master_novel_wikia.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/jcF76rk/age_of_empires_like_clash_of_clans.pdfIn PDF document text
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/5494926.pdfIn PDF document text
    • http://zimejitudik.iblogger.org/76946384033.pdfIn PDF document text
    • https://cdn.sqhk.co/widobixi/dIjdieN/66602060103.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/VhiyAvE/syfy_schedule_tv_passport.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zonebon/54578549708.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/noxititopogewulukebetejo.pdfIn PDF document text
    • http://jetuloloz.epizy.com/zilaxerotaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/graham_capital_management_l._p._annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/55842468509.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/20282270524.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/62367505217.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/breeches_sizing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/zaxuzifusiledikosafatanuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/25885846259.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/nuxosoruwafeguxeju.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/coinshares_mining_report.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 5720 bytes
SHA-256: 993989a18dfc167919406067a9ca3ba15b95ef51b2528d40f94521ba8ed3c5ef
font_01_sfnt_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 10308 bytes
SHA-256: 1ac9e8a863029fba0944f74feb306b7517076afa5f8e43fee8e2f439f2402e0f

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