Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7378d466c15108a…

MALICIOUS

PDF

88.5 KB Created: 2021-08-10 19:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 33bfce043b1b32df4e089bc4a557676d SHA-1: 651ef9f0ed6092583c042d8121ab24dbd61a2012 SHA-256: d7378d466c15108a968e97a324687d67d7443a2268b3eab5b1409c7feb9794c4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external links, many hosted on compromised WordPress sites, and a heuristic indicating a link farm with UTM parameters, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=indesign+cs6+free+download+mac PDF link annotation
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/fa768807908de5f428af1a3b8c3ac473/890218982.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6e451ba1aa89aca4e420a56ffaf1bee3/ragikabeba.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160724cb222f71---winonaxalujegejofebawopud.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c94b85f2e---pojabefewaju.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f514d267c3---kiwinereruzadegupon.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1627434096.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/30604935263.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd1093477e---11537535014.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c044bad1d1---18286687420.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb160ca2d9---zurezuzipazosutiraba.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/d32a8ccd4e00b86b05de1c95bcd791d0/10644837736.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/oeroha5qh5as07k2g83q8mu777/nijadedowuwoxeba.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714eb7023bb---gadubetunajululudo.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/22801691975.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c042c4dc6---guzikagazawezabodosev.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/mopok.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///66281037382.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/palemuvenat.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/j9c8ad9t4q6onfci9873tr53ks/454327181.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af963276ef7---36142440557.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/f107af683b133e5d82cf6675e49a64ec/pevem.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/21923001594.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907a501368c---lipinolovukufadaga.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094161a42ea7---jediwojararoj.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 18036 bytes
SHA-256: 51ec0c6d8509a7091e376b29cd81f3a4060d3a6e8901ecaa65ab5d58aeda03df
font_01_sfnt_off000122cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE6 10928 bytes
SHA-256: 818daeed06920fd2fda26dad29b419d4f126955ae8ce100d922e5cb4e029c0b4

Open this report in the interactive analyzer, or submit your own file for analysis.