Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b301edbd86579a…

MALICIOUS

PDF

83.1 KB Created: 2021-08-13 11:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c081b853f6b3ede630e488976b970964 SHA-1: e3dfc13f5fc732984e829eb999564fdae1b7e3a3 SHA-256: 63b301edbd86579a0f5eb181081ade28eabb852f13ab6fc20d100118b3933d13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to various domains, some of which appear to be compromised WordPress uploads. The presence of embedded URLs and the ML classifier's high score suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://crewmak.ru/uplcv?utm_term=dna+transcription+and+translation+coloring+worksheet+answers PDF link annotation
    • http://hongshengfish.com/uploadfiles/2021052405433161222.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610db83cac9e9---pawuzode.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/77972655460.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/demiwifu.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/kolatidosutitozawipop.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/16307072578.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/wagovopexutavegigezejo.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/lovuma.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cee554c9bf8e780001e74abf17856382/susimitap.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ld4rkknbjnkps8jes5ko15rl8m/54714154842.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/de908b1e4cd8ce204f073462171d53d0/sipelerekimu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160795e7d5b971---57523287984.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37b7ef3bd8---nipisubeforo.pdfIn PDF document text
    • http://yuha.be/_files/file/58964133497.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8e72e8dc6---nusuwowitimalut.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/53409917128.pdfIn PDF document text
    • http://schokozentrale.de/idata/veripetipukiseva.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/gonuralexufogat.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/484e9fba90f86105c63e2e101d15f1f8/30749792964.pdfIn PDF document text
    • http://stasta.com/userfiles/file/91433035634.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/gusuderinefomozajomufefak.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/zibezirazowiwewexuwiku.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/498884a0604d52c518d1b3eee82af670/28343909647.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/fijevabomoxepinumem.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/14479467854.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/7b00d4677eced301496cd2e97d85a801/22477162995.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b0hmgaaurq37ofpoktco26erjb/juvajimamewijawokigu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 17036 bytes
SHA-256: 2b4ba24f49a4d34ba35888fd7c15d0915c444b53a3bca771861d492d04c410aa
font_01_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 10972 bytes
SHA-256: 03f211f8b27d3812bc15c2a6df37107463578c292840723885f749fc139d2bdd