Malicious PDF — malware analysis report

Static analysis result for SHA-256 068d00f68e9f3b55…

MALICIOUS

PDF

89.9 KB Created: 2021-06-29 02:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f502eb6ae16f52b421314d93272fdcf SHA-1: 3885f6908c35ec6dca0399e17f49be8df20f7410 SHA-256: 068d00f68e9f3b5571d8b09aeabbe6c20d45b608e91edeead50dbaa2df5f847f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious files. While no scripts were directly extracted, the nature of the URLs and the heuristic firings indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c042c4dc6---guzikagazawezabodosev.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c955f44a69---libikobiwibakadosavo.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51642e3964---gorotajuli.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/04697e727c806a588d5680f730134f4f/putojepuxubori.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b42b89eb8e1d91c830c72f8e599c51b/fabazumopijipux.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/qr28uefqh7hhe93sh9v8qjdnqt/69912984592.pdf
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/74441959214.pdf
    • https://dursunguney.com/userfiles/files/bezofujetarakob.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/97307d326e1a2ad46490f5be31ebe8ba/33750889264.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5bc61fb98---kijojo.pdf
    • http://ikoi-es.club/yamituki-n/uploads/files/56703632293.pdf
    • http://abimobiliare.pl/pliki/File/22118727307.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3bb5c50f3---sipegutusakutig.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc2230a0da---86018806829.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/cbaa4cbb61c11b1a3f3d7f8dd431ce0c/kasoladoginebemukixo.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/15rd016gjgvdm0dhanv4q2fqbn/13324978116.pdf
    • http://praguetransfer.com/files/file/77642823778.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f79401d4e---puzilemufux.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607929a4c4892---34909607017.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/38b75fd0f12e6854922b007f2f06d719/15812761403.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9377090a2---talilawulitadamon.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70ca632df0---mubejatob.pdf
    • https://balajitutorial.com/admin/userfiles/file/61109952308.pdf
    • http://www.federalreserveeducation.org/fed101/policy/basics.htm
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=an+expansionary+monetary+policy+may+be+frustrated+if+the
    • 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_off0000fa20.bin
1804580a39caeb3095f4e1976b609d413200d7728c732baec9596a37ff77ae30
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 17540 bytes
font_01_sfnt_off00012770.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 16792 bytes
font_02_sfnt_off00013f87.bin
16e4735dad0239b8bef462f8ae337bb637cf12a9edbd1a3b5f65a4139d534dab
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F87 11324 bytes