Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf60dd2157f2133…

MALICIOUS

PDF

88.6 KB Created: 2021-09-06 15:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8e9b1f6cb71eda2da20b0808f9c9d5fd SHA-1: 920784e0e94443e106dc586f5902f07f46d608d6 SHA-256: fdf60dd2157f2133f5a1d51c11675925191928de2ac1eaace68a90fae906924b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for initiating malicious actions. The heuristics indicate this JavaScript is likely used to redirect users to external URLs hosted on compromised websites, forming a link farm. This behavior is consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc76500286---xudubukijusebe.pdf In PDF document text
    • http://ippon.lv/uploads/File/kosikezijonu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/afovizelamowip.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061111011073499.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/zasanikubusedokifevo.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/17690411146.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072a9aa6cc01---68944184733.pdfIn PDF document text
    • http://freeski.hu/freeski/file/70915640999.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a68089870ec---47145927663.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6f3cb3f3d---mosazi.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/5057b0178a01c47282b647ff58a218ee/podupesilejipuxunali.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/pasugilomejeta.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/18784568924.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/90066184037.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/ca91e43e3b11f21091aee09add50a8b9/fomezubezu.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba779cb4b3e---nutopizuteli.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/88ae561687d502cd845c6f5c31cfab06/92204356666.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/zatuveraxazadabekuzapije.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e3ff94b69---gominitunoxelolonuv.pdfIn PDF document text
    • http://midel.me/userfiles/file/79154047729.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857bca554ef---37149904873.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/81797291930.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/85525776629.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/b972d84cd2bce479a8bf1cfabe38460c/86998044666.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210725094055.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/18212264029.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=fronius+inverter+primo+manualPDF 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
stream_002_off0000da90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDA90 16968 bytes
SHA-256: 26eb9d2d6b1897e02b24d62861d5a85f5aa2f2d4e9667d835d5357a996a439cb
font_01_sfnt_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 10556 bytes
SHA-256: 279e17afc92a4a93b703b9f0d94272347a405dbef42763a7f216aa23efbbc91b
font_03_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 19464 bytes
SHA-256: 194034ac3ca738c2bcbad8b60e36776a2fa8f13723003db87fbcbbb372b3bcdd

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