Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf6c318da84ccd8…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 23:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38b3606f3e094c45a1e52a99ff9eef85 SHA-1: 295dd4f437c96b275e8f9dea952ec9a7187f5d2c SHA-256: 9bf6c318da84ccd868375e38c5c08c67cd5163e1921891a9bbe44b8daf56dcf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous links on disposable hosting and the use of UTM parameters further support a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/25lh2ttn0vkcuo7epqubdvh7kf/goremebitamo.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/boxulosojizefupa.pdf
    • http://firewheels.pe/userfiles/file/tagewotofabutuf.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d18f174d7c---zoredidojidal.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/mhsrbbqs3t78uujlrdjhk8t2vd/56192334067.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c09c14d3f56---gefen.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/af7rk1ivmhcu9ep2gbvs6m7if9/7282825868.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb10202d4d---gudavivutudagigupududed.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160823d3e5e06e---bojasulademazuve.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f12dc8fc3---loliveratu.pdf
    • https://pasarantogeldua.com/contents//files/tofagunimuxulag.pdf
    • http://malagi.pl/user-files/fck/file/93452300261.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b0945782722---37956019897.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4d19808327336e5daa41324b923c0554/34759626608.pdf
    • http://bulmarconsult.com/files/kaxazawewujepepobof.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094793150b06---puxakor.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/6fbd7b55104f03b18d5cf5798229f276/roniwovinifupenojosoradup.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873263afe49---49952194683.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/q2a3sp49k6frkimnhcv3i6lmek/nonawetotas.pdf
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/tulutoti.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/a33e1cf83ae0b5c417c10d3bfe444679/76077685473.pdf
    • https://arzhosting.com/calisma2/files/uploads/rudiwigo.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd6d3cd95c---76566340183.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=my+book+live+duo+windows+10
    • 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_off0000ea0e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 16792 bytes
font_01_sfnt_off00010220.bin
a0bdc7d37e1ba48e56325e1bc4d455f819736b2a586ae623b66da5f2b4395ec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 17116 bytes
font_02_sfnt_off00012eca.bin
f2dd65939bc22708e03295aab4d0b006f2d0f0b0f1fe5a023635f8e6d4320ff9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECA 10648 bytes