Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b56bf7cb074d79…

MALICIOUS

PDF

157.5 KB Created: 2021-07-03 21:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 444b65300a8871a84b2eaebcd3157181 SHA-1: a862e484dec03734f96098c6362cae9cfe876cfc SHA-256: 05b56bf7cb074d7939d5dfc197c37d617d2ae9adedaa6c76c92e8182b540a806
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, likely intended to host malicious content or redirect users to phishing sites. The presence of external URIs and link farms suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=wicca+pagan+religion PDF link annotation
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090e4ea6a0a2---xarerotomivojuxidix.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d761afced---70600608167.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/24894601244.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d04f4a8b76---42791883183.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/615916bc299464ce4ab2098c25afad3c/51188656412.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfaf0f075---53585759942.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/97645176901.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/34655460629.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/66576798783.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e65dea95eeb83c144cd2cb2fb166a47a/nidejawabaruwidezadem.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/rasetilatifok.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/69991530327.pdfIn PDF document text
    • https://eslms.com/userfiles/file/timurekurilabituraxen.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/27g7kqqj520egms0ll8l932etl/49584368221.pdfIn PDF document text
    • https://laps.pl/userfiles/file/55675387456.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/93371859985f27aa1cca80b7aa34e57a/puneni.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/fabafinidixiwotowex.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b45530dad---josolojokof.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b873e75e6a6---91837712929.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/jipasutijazasebanorutizir.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/garulotapumaxofanofo.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/ac9fd9a3a0ab0322b22c1377fa9c9570/77229060209.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7g42ks18oo3aci9ufttcpg43q6/25256603706.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_off000208c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208C1 18548 bytes
SHA-256: 4ec121c699feb645896144852713c4cfbeed1b872bee0f42bd20bae5e46871ed
font_01_sfnt_off0002390d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2390D 10276 bytes
SHA-256: 193af48ffcf172347374fbc1d4f9355af3ed1beb2769990ccc10e08b16b67664
font_02_sfnt_off00025050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25050 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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