Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cf1f79805a8493…

MALICIOUS

PDF

457.1 KB Created: 2021-07-31 10:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fb6856002a8a37c6c3e2f0c4bec6eae5 SHA-1: 446b3ba4fb32f203442ba29eaf49de1db732fc95 SHA-256: 39cf1f79805a84937bc35e6dbd0c7cd1f184569ce17570da081dfd0025171b66
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, which host further PDF files. This suggests a phishing or credential harvesting campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of numerous external links and the nature of the heuristics point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7254

Heuristics 5

  • 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.
  • 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://dalyanestate.com/userfiles/file/kovijadaxajifixog.pdf In PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aab774e4b---52597373871.pdfIn PDF document text
    • http://fedoro.ru/upload/file/80868259787.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/bn73sunil5sbh9846fmh9acore/51372699060.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/nuwakiladejozudujojosod.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/bbffc517b53ddd428d4f15323aa016db/werelaxenegukafasapetalig.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830f5ae390b---10325196576.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/18958284281.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/mipanikonokasadafejadufe.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/725251f81710fec0b74d8023031d0a84/vilujegigodenobep.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f28cdde4d0---balebiwilufuzafubijafixiz.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/2361016404.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/01e0dc02ba14e6502acca21bf8d7d5cd/tewulazepexufekugosegos.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d79b8609ab0---80109764834.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078f32350d44---45071311739.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/rajajipaforixuliriwig.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c45d5ca223118b7d907d598ab3e8c7e7/48455619267.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/615c2a179883e2e68fa17f99a1fe863d/99815197450.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/37058815306.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607375d796b7a---lijekelaxiziv.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608378eb70b08---derapisavuwinirex.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/10udpgrmq14rc208lfrpm663dq/kokadetamesuwuxana.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/356b30a79621a2d7998394c6e0035a7c/jovururulobuvexiboxojala.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e99537121---zumefuselamopimowaduvuz.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/gifuwovowu.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9fc76cbe4---kidizadabama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pathfinder+kingmaker+sweet+teeth+errands+failedPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006987e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6987E 10860 bytes
SHA-256: 09e965cbf5700ef915ba756b6a03d74fb0ecbea5d399c1218142d7f81f646033
font_01_sfnt_off0006b132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B132 16084 bytes
SHA-256: 60e59e701608a08463d5b80eeb63078ed3bb5b9c42262fbabdebabc3f6b258bd
font_02_sfnt_off0006c65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65E 19092 bytes
SHA-256: 08e63e164a5d0c87aec60cefd40bb64cfe782063edc06cb03feb7838cad00610
font_03_sfnt_off0006f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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