Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9e3b0e167e0c97…

MALICIOUS

PDF

73.3 KB Created: 2021-09-02 08:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fbf3f5962cffbde1bc2a4dd71c37f7fa SHA-1: 53d6242dd7abf99586c50d4981212c9561b0ccb3 SHA-256: fd9e3b0e167e0c97fa3ca78d69f78a4e440637b65f2e0e0902253abef4598e59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The primary goal appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=electrical+measurements+and+measuring+instruments+notes+pdf PDF link annotation
    • http://naosgym.com/userfiles/files/fadiwoxibaf.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed0f146faf---69309636762.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/todogu.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/tppagtb3q37e4ov7akbg5qnnv7/zunuvivit.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c9dbd44017---mudepiposovikavuvis.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/lijisebelujanalosoro.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/7qotqff3c3mvp9lnd2q6lv0vd3/11314327598.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a21a7a454ef---marapaserilajerovivuv.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90b2a4f9e---kalujolo.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/zolizam.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/teposimosuzawozerenepef.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/r8imi1gba03ovqovu6vioa36ub/takotawigoxuzaxonakoruw.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d63a1713dea---jiworolatuv.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/naxoruje.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c5293421aa3---23970520728.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/e4f7f4732cd1d7773f6f309a1b81cfe6/80243629425.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb68d96c80---97618237688.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/5828374264.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/89342851222.pdfIn PDF document text
    • http://sbcnepal.com/images/file/pevebutetukenetu.pdfIn PDF document text
    • http://renknh.com/ckupload/files/pivebagatatidagukigi.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/81883978643.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/jetokosikaselivop.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/mimupasulapimup.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/25367953462.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_off0000bbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 11044 bytes
SHA-256: 07d2cb275522225b46716e53e43343d3095384737f5ac3fdbf61c244e94b2688
font_02_sfnt_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 16596 bytes
SHA-256: 99bea994394c96c37e0ddd7f28966859b8b708bd5042848adc1fa893b86fba82

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