Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d07a972c7b4317…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 02:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4e617b7eea2f719432e4067c0da48a45 SHA-1: a10a4091ccc770a2e39d1a22517960ef3b727f22 SHA-256: 47d07a972c7b4317390a3ba1a5c1438112708735ac37dcfc2ed8b06ef96d4fe4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/8gd8onklldganu2loja6fljs66/89390007296.pdf In PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/6847abe3430dfc8ffb767d0421c7db93/kexakisemojilanuzewova.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/7259151693.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210628095404.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/5a93ef7a3aa2c3db6f27707b653affb5/64472976050.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/gpd178efl9pqif3nc5n7qnfsaq/79008202814.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e4f4de9c9---53603100685.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a492fe0c0d2---bajobatoze.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2de6ef55---37164526733.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c765aa51---96944166052.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/38431793453.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/63547838249.pdfIn PDF document text
    • http://yoron.net/up/files/69723141188.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/jonalogugetevupa.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/15601281688.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/mavabuz.pdfIn PDF document text
    • http://termocity.by/pics/files/10401069682.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609847c0d844e---sepigiliturinobofa.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/68281512971.pdfIn PDF document text
    • https://aashianarealty.com/file/duteranexagedekimel.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/4mgum05k63tvcfonipvpv0hqpg/92575811642.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/7f447b1bdc9f56834d56d02446873a48/15713801964.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f5f1af037---fatonaguberusumojiwodax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=turpitude+in+a+sentencePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3E 19216 bytes
SHA-256: bec46a25a92ff6e43513434a6d1f43c1caf091a8073c0fb7c2dacbae08195d37
font_01_sfnt_off0000db51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB51 20212 bytes
SHA-256: a943dff962c09d2a7e95e1253dbb16c90017e45a97b92279e942ddae262be214
font_02_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 10404 bytes
SHA-256: 7dc9d060cc622452f6c84a0f0070368ffea037ae9840fe44ad51fb48af82d10a
font_03_sfnt_off0001261b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261B 2392 bytes
SHA-256: 7e47c1e52d9c208aae25ba2494c999c2a1ac69a0e42ec76091ccd1640c5c03ae
font_04_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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