Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d6d80821231112…

MALICIOUS

PDF

93.8 KB Created: 2021-08-23 18:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 539074d16cf701a02a6cec2c45612f88 SHA-1: 8ae90658a8a8305d5abd2d604e57387934677fc7 SHA-256: d1d6d8082123111251a73fd9e247e00fa493c1c42abc648ea405b0b80044e8a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. The primary purpose appears to be leading users to phishing sites or potentially distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://irlanc.ru/uplcv?utm_term=options+volatility+and+pricing+pdf PDF link annotation
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/2514vqdrnncq7b4elilssb6dv3/dozikeporazovidetenufor.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/87586578667.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/tujoluxopizufulafi.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/wukokokevukisejojugusax.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210616041059.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160abcee01932e---84837735197.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/fedde3f07d365c9d308eb3086ff6e818/sovuwufijopatoburagiso.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/55481d453263d0ff121fc1a95a8e0a14/mipogipikolovasarelu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/063e06dbfccabef7109e3daadd69b259/kupalizasufutekenadox.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/45937860134.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608e422204dec---gixosaxiweveragu.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f933b56f8f5---14068252116.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/61832103393.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/711de2f3d844752c90f1aaabb436ea82/safunupixemobajuwovoku.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5165082ec---gunimodujexo.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/93247139399.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/bemisotabemexutesiw.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/36339951181.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/58098790217.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/13066787693.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210714065058.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/nonofenozuxufikoragipivi.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202108070514473077.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/1207673442.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/fevazawikovowalilutir.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_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 10868 bytes
SHA-256: b702a35f32d750c223636dacf5780248211d85c71d62864d139905af6cff4425
font_02_sfnt_off00013e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0D 16744 bytes
SHA-256: ce539f9c1cd68ceb1b1516ed91e1608d3556311346d300b06b8a769fa0daf43e