Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fe29e924b53772…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 11:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 018996e92567e4d4a276cbb67fd57458 SHA-1: ceae7737c3186293f85323f6383add832417a906 SHA-256: 00fe29e924b537725990a320af2b54a60862671a2034a63911ad76aef35fbdb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing lure, likely attempting to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://askisan.com/upload/ckfinder/files/tiwezozi.pdf
    • http://ancheng-medical.com/uploadfile/files/zalavidezadojuxin.pdf
    • https://dienhoanghean.com/upload/ck/files/sidasonaduzivuxamaxoz.pdf
    • http://aimic.com/userfiles/file/11270720750.pdf
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/35158550373.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/nowozadobaze.pdf
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/lefasajuletotunajawi.pdf
    • http://amicissiapiemonteisa.it/userfiles/files/42906788597.pdf
    • https://tigaintan.com/contents/files/xagixupeduxawofeg.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb592316c6---rafobipezidurani.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/juxitovodokoluwasosilod.pdf
    • http://safaraval.com/basefile/safaravalcom/files/fegeluvosemonifutetukax.pdf
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/jetejerogivavanaweraf.pdf
    • http://expnavi.com/sites/all/sites/default/files/file/sexewufiradazulabo.pdf
    • http://uni-farm.pl/ckfinder/userfiles/files/tugubinakajotinita.pdf
    • http://inarchengineering.it/userfiles/files/tenetunusuze.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b5b5785b---vebanapijavonuxufumo.pdf
    • http://veterky.ru/ckfinder/userfiles/files/nevolezuviw.pdf
    • http://neo-net.info/giganet/files/file/mozofuluxigile.pdf
    • https://eccdc.org/application/webroot/userfiles/file/japojozero.pdf
    • http://movietek.vn/hinh-anh/files/76577545458.pdf
    • http://revize-elektro.info/UserFiles/File/83825159158.pdf
    • https://toolsatool.com/userfiles/files/pigunex.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16137c313f20e3---92590161481.pdf
    • http://tw-jia.com/uploads/files/202109130724341471.pdf
    • http://shiny-baby.com/fileimage/file/woxakazituvuvunobal.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=block+this+apk+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da12.bin
5f7b6d022faa1b76ebf86e2501f9feed90c235cb9f12ba34c132a6e519918e0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 18320 bytes
font_01_sfnt_off000108b7.bin
2d2d553bcfbc2d52e4b609adb5e427a6cc9a0ca2a2c48b2fb96f1d308b722968
pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 10612 bytes
font_02_sfnt_off00012109.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 16792 bytes