Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fa0c60e107a0e5…

MALICIOUS

PDF

78.3 KB Created: 2021-08-06 12:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5c0c0afd6a10af80571d59f90dbd6db5 SHA-1: 88e7ad115409c01a8102954f64803a6105c579b9 SHA-256: 62fa0c60e107a0e5142bba5548f22ea4945898450d8fea617903623bd0443086
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to lure users into clicking links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9153

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
  • 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
  • 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 http://donghobaoan.com/uploads/files/20659268178.pdf In PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d51b58fe0---vomolapevokofijexedemuse.pdfIn PDF document text
    • https://premium-house.uz/images/file/xesopow.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/36952629510.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608223c7a0cfb---92053746115.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/13vdinmfnmv0in2nu7q5or1ic3/15256670628.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/zasabepagegeletuvuba.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d76664a18---fobata.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210513065736.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607811dd32a35---pesituwupedodedoziw.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/taresaji.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/415241545.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210724073451.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609016e9a1a5e---81105134691.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c499635652c---foxuj.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/votezazu.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/kamidaj.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608feeb655c58---vepowofovorovejakav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=online+horoscope+generator+tamil+pdfPDF link annotation
    • 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_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 16980 bytes
SHA-256: a78cc0e9aaadd0f619a587494a2566dbf0ceed7b6cdb6033f4de6d6537b3baaa
font_01_sfnt_off00010d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D90 11092 bytes
SHA-256: 391d984735a1ae7b89852837387eb47b7b136029856c622921466b00a8f72958
font_02_sfnt_off0001270d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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