Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8246886f074820…

MALICIOUS

PDF

96.0 KB Created: 2021-07-13 18:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 11ade334f62f35f35a8be8a5c9839170 SHA-1: f05f6f020f5c53005eafba63755637e4b8c98b8c SHA-256: 6b8246886f074820752b16b83a2277549357f2fa93734e7f989f2c6433792c80
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites, likely to facilitate further malware downloads or phishing attempts. The presence of numerous links on disposable or compromised hosting further supports its role as a malicious distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pakistanchristiancongress.org/userfiles/file/75559695559.pdf In PDF document text
    • http://wannawwannie.pl/userfiles/file/getebaf.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/916832ebd08c983aee98d74727c43a29/nukobosinoxexaxaxok.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b326e396079---pewofaxugapoxurinodupowo.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/67304007e6dd7211e9e35abcc3623ff2/82504987828.pdfIn PDF document text
    • http://iltorg.ru/upload/file/59039657552.pdfIn PDF document text
    • https://adikkedua.com/contents//files/88594789123.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/66792755302.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/21564764891.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/pozevuzanuzug.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f205b2ef---zupekufugoluzepewij.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093a05463a5d---56408694360.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/b1e609f7fe5ef08eae4b89b44eaa22a9/karapawowepat.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081aec152851---vibemidefegosujo.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f4a47a16d---fofutukuzasemivase.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/junujanobopigi.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711eff10f77---21461021238.pdfIn PDF document text
    • http://planbmedia.hufiles/58014002410.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ccf2f81fc9b1eb6cbd4ccfb106ae0ede/tolesipapoxoboxurufuzun.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bccd59fd9---9231797101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=holy+theotokos+of+iveron+russian+orthodox+churchPDF link annotation
    • 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_off000114d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D3 11036 bytes
SHA-256: 2d6383c308f81002822c544e99f3426aeccb46220d4646ec365ffbaeaeb55cf9
font_01_sfnt_off00012e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14691 17020 bytes
SHA-256: 71b5e66c676ab560d9a9f44ba7e17680d441e80ee7e7e9c3ef4ff6292deaac55

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