Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d38cd60fdbea06b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-11 19:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b086cb841d5afec396fb485390807525 SHA-1: 3ead108401ce3df56421c984e57f9da5fbb1433b SHA-256: 6d38cd60fdbea06b9f7802411ad9e15a3e58c04fd87fbee5653853604f39f6d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a link farm with UTM parameters further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=sanam+teri+kasam+full+movie+free PDF link annotation
    • http://fukaofoods.tw/uploads/files/202109041313564565.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/sr00dl9r7a3vfvia29f9dg079m/lulorazewoxopokukano.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/83889257739.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/7442315115.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2902e678e---36346526597.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/97548179237.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/naxagim.pdfIn PDF document text
    • https://birudongker.com/contents/files/4416407427.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/namulejirepak.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/sivuja.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/zawodoxiwutugoruwexetapez.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/3e2deeff3dd8669cee9822cb4a0347cc/zimeg.pdfIn PDF document text
    • https://partnermind.cz/images/files/tuvudugevarekazanire.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/woxata.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/butefibubig.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/zanalavoreriwuwen.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210908123604.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613099b960eaa---salazatakunes.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/21611067819.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/92735115795.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/xeveko.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/12742775992.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/79201114174.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/a9d02d3b6bce19f87270f9b6e1210446/77411259746.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_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 10708 bytes
SHA-256: 8a883d0eda7f83cf69612b42b50e0d47581c97ee4bf6598af74b1230c7884593
font_01_sfnt_off0000ef36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 18220 bytes
SHA-256: df8e33f62344bc4294e8b5eb2580e2538be3aead32e1ef11141a78fcf70d26f6
font_02_sfnt_off00011f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1