Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa94d1013005917f…

MALICIOUS

PDF

87.9 KB Created: 2021-06-28 02:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42fe83247d883af861c4dd294d63a474 SHA-1: 0160c0d2e57f662c96b1953269d232cde41eb613 SHA-256: fa94d1013005917f3fdece5bae51cf95a491699132e7bd625816c8cc194eb2cb
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous URLs hosted on compromised CMS upload directories reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0f395a355---67403665574.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b820b10b356---vuparunosarozise.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c44d9e63---zeputovaximexulakafeke.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1051b0b40---bekokakojaboxegabexo.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b6e33f0bf---89001231844.pdf
    • https://biothiennam.com/media/ftp/file/96480414760.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/totrqpfn0578bk22udoutjsed8/51983681375.pdf
    • https://fwullong.com/upfiles/editor/files/rolejizitumaluwexin.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097025ac9bc5---vavukasavowexon.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd5911cf36---wokur.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/41cc9416e49914caafa19b1a85505c1a/33890758862.pdf
    • https://dijitalsanat.link/upload/files/33509747242.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b3d979dc---15001003287.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b15ce37a75a---netibolafilu.pdf
    • https://conexkarvan.com/cache/fck_files/file/84786511983.pdf
    • http://smart-ventures.ch/upload/Editor_Images/files/81610479490.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b839a23f8---60964480650.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a91e1cd52---zuloparujoze.pdf
    • https://webvitamin.vn/app/webroot/uploads/files/wuperurag.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/hemoh0k3000n6ibg57amfinlsd/welarefeduvukimulifa.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/q61k296dd93fsg4140evmqu5c4/mapumuguvutivuguxu.pdf
    • http://asude.istanbul/ck_images/files/vobetexenalow.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/pmtv8i7abjpscsja0ip1d65vuk/44118286441.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608949422f3c0---53453221446.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2c7a936b7---71628960235.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/dd4f54b5aeca7cfa348388ac0af7fada/pefupu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=marginalized+people+meaning
    • 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_off0000f04f.bin
46b296dd3fd9e14dee8d546acb6d1ad0de33c931bafbef921551c99d53aba67f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 10520 bytes
font_01_sfnt_off000107f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 16792 bytes
font_02_sfnt_off00012006.bin
1897b28f38cf789dd33a77f933ec31bd4bf264b6c6f90c538e4ec4beee0194f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12006 18632 bytes