Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a633b60d4fc605…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 09:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec4d7a9143a32577649348058daadadf SHA-1: 44a04d6f6a6558e6fd56417fe5e011ca70c361c6 SHA-256: f2a633b60d4fc6057b0044030d152298a99abf1bf287e8ea5d7d9caba807e0eb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to external resources, some of which are hosted on compromised websites or disposable domains. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://media-get.com/userfiles/files/69085741065.pdf
    • http://bassbasement.org/userfiles/file/roboguto.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/ce37085889db00324a45b0b81a58764f/kejumolubiroxapubeve.pdf
    • http://firanywiktoria.pl/uploads/editor/file/7021125125.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/m37pskrkmfmrec9vpk9es74los/kugifosugasinojatuxuke.pdf
    • http://ebd.su/UFD/7623/files/matetelukerezofusositur.pdf
    • http://firewheels.pe/userfiles/file/detujezufadofolu.pdf
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/lowowadoposulonowe.pdf
    • https://krzczonowice.pl/gfx/file/71822327179.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0445d21379e424edd675c4c555268bdc/mupixosuxobigovefose.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768ab1b57e7---39353247660.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c765ca8630---36924300461.pdf
    • http://mofrantech.com/userfiles/file/midumovepakuluput.pdf
    • http://bethelcommunityone.com/clients/880032/File/ledenodalibulo.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f459018af2---20138285303.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607750b21ae72---88347660809.pdf
    • http://185.33.116.145/~acus01/upload/files/41033849196.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c820dbbd6---364504972.pdf
    • https://devcons.org/uploads/userfiles/files/kasogofojarive.pdf
    • http://betaempire.com/uploads/userfiles/file/file/29983562092.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160beb8972b653---65524155310.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/d8a9f1d035245a8ae09d04b00f22dfc4/68257227922.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=admire+meaning+in+arabic
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db57.bin
5a3a98f5c299bd27062a2313aa804f5ceaae5ecd511b87dc93111c3c18c24677
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB57 23096 bytes
font_01_sfnt_off000117c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 16792 bytes
font_02_sfnt_off00012fe0.bin
7a8068cf7f9b399d917f2dbdf4b95cc162eec59d325960e2bf74dd2bb21b871b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE0 10400 bytes