Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff386d427459321e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-21 00:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 190faacef32a2267460d61f1fc44d027 SHA-1: e6659158377fa52b84beb3e0b40e8c2d0913b6b2 SHA-256: ff386d427459321ec0ab3d2fdc876fc40fe8a2f2bad15b4c79334fadb367c39e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing campaign, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://infrive.ru/uplcv?utm_term=wallpaper+picker+android PDF link annotation
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/52731197925.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/458621bf74f760fa4afc02733e4258a1/42133331801.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/sokaxusov.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/69508691512.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/92563001646.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69730098239.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/lonajedomaguv.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613867e38acb3---pakalomawabuxasuwi.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/88564693848.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/98284595407.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382616e83f0---95771812167.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/kibowupezeb.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/motidubuxenigam.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/xebenekax.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/4472619922.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/rusiwasota.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/bu1t52qclcehpjbuhc0nhrveq6/86267380522.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210918061037.pdfIn PDF document text
    • https://sassanoproperties.com/FCKeditor/file/dawoxagudujudezebirok.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131309909dc2---wojonusi.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/49915807332.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/farujivosutewopibapuxu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/69dd02b42b8296e592143a934fe7f753/76841956411.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/pomovomafa.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/luwop.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/nafetapotagikidozifuwem.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_off0000d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 10328 bytes
SHA-256: 90c7b0645dc2d894e5700077b98bf7cdade7b4e645ed537bffed2558cea02a79
font_01_sfnt_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 17976 bytes
SHA-256: bdd24ec5adaaff0f2072e59133fd6fa471c9e7817da984c4f22e0fd418eb5f24

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