Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccc261b9ba28b3f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-18 03:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 95fb32af87afee16f378d3c2f01d3a3f SHA-1: 6069ac2888a208f5d4f9088ca15d5c687c795012 SHA-256: 2ccc261b9ba28b3f865680e028f4ebd112709639bfab82009b72e3fcbbc4b796
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous external URLs, many of which are embedded within the PDF structure, suggesting an intent to redirect users to potentially harmful websites. The presence of multiple distinct hosts and UTM parameters in some URLs indicates a phishing or malware distribution campaign.

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://catamma.ru/uplcv?utm_term=one+block+apk+minecraft PDF link annotation
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/vigupuvasikivin.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/werexomolorepob.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/5079087864.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16143f49134d3b---kesofagiwe.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/lewazuf.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/44836189784.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/87554594442.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/lifexejuxuz.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/xorudejipegejexu.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/66166552388.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/jiranatonug.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/68885574914.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/kaparu.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/bekijuretavujexanerazusa.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/61665977378.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/tezoresikitebikalekolagog.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/15574443854.pdfIn PDF document text
    • http://domainecomps.com/documents/files/89737711936.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-01/images/files/wexarudovotuvovajasopub.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/nisukuzavigotavi.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/xexato.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/lizelumixaxe.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 16836 bytes
SHA-256: 1b6acc858ddc391123b251d22041d6848d78c2ff1f4ce6361e1bb22928eab5c9
font_02_sfnt_off00011761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11761 10728 bytes
SHA-256: d9d9a223f01c30f87088b2b610c8788d8a0fa8de42d36ba3e0767b3701d89bae

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