Malicious PDF — malware analysis report

Static analysis result for SHA-256 775717c2974b6a5e…

MALICIOUS

PDF

87.1 KB Created: 2021-08-31 10:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 057649ac1c845d5b36d92ce8bc9f1ded SHA-1: 7f3fc33cf0e78eacb42889f2547f2cbf5336ff5c SHA-256: 775717c2974b6a5ef2d35bc1f909fafa934e5f436c11288153824b08ec3b2066
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The document also features a large number of external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to phishing or malware sites. The presence of embedded JavaScript indicates an attempt to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=production+technology+book+for+mechanical+engineering+pdf PDF link annotation
    • https://grandplaza.bg/uploads/assets/file/20124727818.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/72936199395.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/9e4f68e3fccdd0907553c6487a5da7dc/30528538849.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/56009160877.pdfIn PDF document text
    • http://ifap.it/images/file/80349430993.pdfIn PDF document text
    • https://bursac.net/userfiles/file/31373920968.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/76570528724.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/37709553846.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612acb5d881f3---59036598905.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cb0b16d4f---farabuzekoratevepifatew.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/feb7385ba6c068e19a9df29495fae903/53993852642.pdfIn PDF document text
    • http://greenbrier101.com/userimages/54392317156.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bf86d728443---wolorirabavinaredixorowe.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/jitijejazagesijipotemum.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b451cb9d1f3---tijisuvapopasopugot.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/61740166034.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/bd2kked5psqkfbhbtql772l6mu/suwozopunetemafugemovotiz.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/56687010805.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c1d772756a59a3581f7a0f319394d605/bibibip.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/puvil.pdfIn PDF document text
    • https://majubesar.info/contents//files/sojatawonamesogekoxuvab.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25d6bc6c84---fitudunamagofoxe.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/5339827833.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/37805263683.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/58372169812.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f6afa994ae57c807c0cb2e8251586470/94027316508.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_off0000ec39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 18312 bytes
SHA-256: 684caddcde555b95b6442c64a71577c923565525152fe160ee890f8272a4c69e
font_02_sfnt_off000133db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DB 11348 bytes
SHA-256: cde1f66d04ad3b760dcccd2f4a739350d4765c5dd0cb9d0ce8018f683f12769b

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