Malicious PDF — malware analysis report

Static analysis result for SHA-256 647d44dcc698e44c…

MALICIOUS

PDF

82.0 KB Created: 2021-09-07 20:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 97125c320188da80be38818f4e1033f3 SHA-1: 79b702d7be2043669169f85a64249e153251be9f SHA-256: 647d44dcc698e44c54648ac11a05403c5f937ca80fe98ba688eba17d1471137b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting a distribution mechanism for further malicious content or phishing attempts. The presence of embedded JavaScript, though not directly analyzed for specific actions, is commonly used in PDFs to execute malicious code or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c81f9dc7e---69477803300.pdf In PDF document text
    • http://henanshuangxin.com/d/files/43298459973.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/58460037627.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a982770cc84e1ec0f2b595070b8ba9a0/devuditujaxarikelufamasi.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/28gpl0hs7qjam9o0h024i0gv5k/safekilona.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/geputilujodude.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/8uifupuab5nc4f32o6i5us64sp/34199310941.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/rolifubagej.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/314b71ac77c99e860c7a9b670b5fe4e2/2917563994.pdfIn PDF document text
    • http://usatovl.ru/upload/fckeditorfile/14279519726.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878ed067318---tujoxotono.pdfIn PDF document text
    • http://mwcapital.net//ckfinder/userfiles/files/45312639308.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/9m4jq4uvrc8ku1tvlc58vh9dun/44347785524.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/bdfc2e77e9731a412d487e22de1a025b/26891698544.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611bee0b4bd97---59850005876.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-7/file/lidemiwejezufawejuso.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088426da2b75---49582410454.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e1918481d---zawuwobe.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/66b5cce7cdc19a34e3bc98584c44fc3d/dumawosemigad.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/wizasuzodaf.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/us8na4qjtumppd3thikufrogl7/pomebufifemavokegew.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/fb2f18d56f50538534b9057bc0c00113/38413618436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=keynote+ipad+tutorial+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 17956 bytes
SHA-256: 7139499939e018b3d95e18c8291f8eedeca231c81ae23927a033a3e29a890d8c
font_01_sfnt_off00010906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10906 10528 bytes
SHA-256: 39cb0483904b63d270519b43d81d26fde9318d114e3e1bf0bfb9d0cadcabe73c
font_02_sfnt_off0001211b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.