Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86ac35d6cebbe93…

MALICIOUS

PDF

70.9 KB Created: 2021-09-29 12:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d27e664f2d24a591917d9351af3fef31 SHA-1: 8786ff79ac8b2a7c6a0d454a846b7e9801befd02 SHA-256: f86ac35d6cebbe936c4e7d462724ab1c90eba0fc590731c8634d2cc59bd27d21
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to various domains. One heuristic specifically identifies a link farm on disposable hosting, and another points to a compromised WordPress upload storage. Embedded JavaScript was also detected, suggesting potential for further malicious activity beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 https://infrive.ru/uplcv?utm_term=new+movies+2020+full+movies+english+action+adventure PDF link annotation
    • http://kingsauto-bar.com/js/upload/files/50642595880.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/24519921466.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b6ab2d34dd3714feb9ce79b792079481/janekenedikitexol.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/ligunadatanitila.pdfIn PDF document text
    • http://tahokart.ru/userfiles/file/xefiretupib.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/simapogawova.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/depopos.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/11564226946.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/xaforagutimobakonuvipipil.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/39461023503.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210925183156_0iyr3z.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/en6fv6v7f3cbj91289ag8i1u03/76140387236.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16130c1e7b5f19---33769757225.pdfIn PDF document text
    • https://okazionche.com/files/7888084729.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/disonorotudaxufubuvebum.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/50491778215.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/p1sl3srkpe5bb5dk2smptki4ub/babexegaw.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/juxujinisesowawawupasema.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/wetonawobuxubutoxo.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/rugatalamenolaxi.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/surobegejukojejaxin.pdfIn PDF document text
    • http://workontext.ru/media/file/xaladimanediv.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/26/file/20210926_192513_198.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/mesuruvevam.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/rokofipalazoduw.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/nubireworodeboj.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_off0000b552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB552 14704 bytes
SHA-256: 703ea3b3fe14a6aa0305ac7db6376dda322300e6e0e3c2e8e8c7c38ef976cfdd
font_01_sfnt_off0000da4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4D 11392 bytes
SHA-256: b5bef0b2692e5b3146c9467aa6f1608f9cade02f1d662deb94c5256bd995926f
font_02_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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