Malicious PDF — malware analysis report

Static analysis result for SHA-256 70de649077438d07…

MALICIOUS

PDF

92.2 KB Created: 2021-07-23 19:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ac5205b5b99090a7d0afd3d098919eed SHA-1: 1ac92ceac2f184756fa6da47f86d5cbcc86a7386 SHA-256: 70de649077438d07762c6a8189af20dc94c603fc87de2c1ab97895edc3a10357
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the embedded URLs are the primary indicators of compromise, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1560e0d1d---9124658785.pdf In PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089efa8614b7---87289352453.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/wijulatorekada.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8a3be52f0---sagubowabe.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160848832efb9c---3665992397.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/8704728274.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622760277127091324.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075081a9b330---49654186206.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/23618085185.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/ponuvujupirenawefuvid.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4933c78bf4---22213244828.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/rirokimubifedesu.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814fd666cd5---sibipogopimaju.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a151f690ffc---16743524460.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/pimubagebova.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b5ca6a3c5---jusini.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/midamabowarukoloj.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/62939041871.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/55673509606.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6cfa24565---xizixivolad.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/14260477712.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/82070432908.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c823409071---gafasawikosuzexovavum.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/jejusamonerirami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=samsung+j5+prime+android+9+updatePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 18260 bytes
SHA-256: 6f4fd1b78b982f465b8a73ae5dbdb67fa0038ac5bdbf88756c4e15be7f4d97bf
font_02_sfnt_off00012f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4A 11296 bytes
SHA-256: 74b5dc18715997c4ae2631699fe516ebfcde9e3490d2edff8a6c85fb79300aba
font_03_sfnt_off00014997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14997 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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