Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0b7bcca907b8d2…

MALICIOUS

PDF

91.3 KB Created: 2021-07-15 11:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dff648f4a7237070f18087c8c5322a75 SHA-1: 963ca964cd99cabfd4723f1a6f713a2d6a6cfb03 SHA-256: aa0b7bcca907b8d2f9fce984db7d10e427a0cbed4a6859f9c7c3b474315ff27d
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 WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. ClamAV and ML classifiers strongly indicate this PDF is a phishing trojan, likely intended to lure users into clicking malicious links. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607685e9d340c---35040401997.pdf In PDF document text
    • http://nutrisoilvietnam.com/upload/files/jivarulekesijatefib.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/piniluvakesapu.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/44085460223.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fcc29ce04---89097991977.pdfIn PDF document text
    • https://peterdegendt.be/file/paxetome.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/72360626538.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210713_61986FC4F811F1A9.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/lalarikofob.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/48657422999.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e61a246e9---wanefemisuxazozogikupeju.pdfIn PDF document text
    • https://harom.ro/files/file/32903855957.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/tenek.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/chpg5qk88ks08g52r99150t53a/towaserefet.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d020f1addf---26002255113.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/lemapetexometigirepevo.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/789d32bb478acc396b482a6e9143f5b6/7873646792.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7923974451---39828129056.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078dfcc0d618---91997658297.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/24389561dc298e8d442ae313dc970756/sazeberit.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c28d6e642---93100400571.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/7437b6875cf3da26f24a074d113e255c/fotutoxawidalatafurukokon.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae8348a043---40608424595.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/583e7ec058762192f04b42ede29d5fcd/levedotibemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=daily+general+knowledge+quiz+with+answersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 11124 bytes
SHA-256: 356f00ea5ef62f98a9b70cf96cb639f58a724bd56ed439dcf8083b31a01f2d60
font_01_sfnt_off00011879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 17376 bytes
SHA-256: 9abda431cff5004c0546bd2f80af5b934c0d1d2ba75cd79052405e6ac4aa3269
font_02_sfnt_off000145fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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