Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaac1a0ac021bf54…

MALICIOUS

PDF

84.2 KB Created: 2021-09-07 08:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d8d870969557cc3f0ef93fbf147394e8 SHA-1: b1f9f4c39a38cce6f61a2032b4b68d3124562b60 SHA-256: aaac1a0ac021bf540d37f2b6d4da6e2d268bd2d7b20d7b4940051acf50bcb6e4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a significant number of external links, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on distinct hosts, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded JavaScript likely serves to further obfuscate the malicious intent or directly execute further stages of an attack. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • 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://philabc.ru/uplcv?utm_term=pmp+practice+exam+pdf PDF link annotation
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/43803754649.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210510082754.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/30509686174.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/1a4f07662c6a375101750fe2f2104f6f/tagijobajisulizil.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/34628062081.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zokakiji.pdfIn PDF document text
    • http://friulanapanini.com/images/file/70002497270.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pomixajivuxujexafora.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0f0f0b8c---44377517317.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/ginorawaxaxaduzegatiji.pdfIn PDF document text
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/kobanu.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/54494856385.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/64197497315.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/27594523290.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/vesenebizolidulogexa.pdfIn PDF document text
    • http://babamoleskine.com/files/file/bijomegoladeje.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611568c25b8d8---68758385607.pdfIn PDF document text
    • https://zhansq.cn/upload/file/19276555961.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/wigewogudepanurog.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/fafamazagawukuxefek.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/vtlt8vouff3f6aetcqsfljbdr6/59812659930.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d23f1579---13395418766.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/jimixogegot.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/laxiragebalewuwoketidupiw.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6d8de45246---88918403427.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/aed46081bbdf64f4e69855676d5daf31/pobexizuwejejer.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_off0000e306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 18656 bytes
SHA-256: bf18ad58a7282ce7861b4e8a7b4912b6a4807a7921263385a8f4d650e996e831
font_01_sfnt_off00011398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAF 10448 bytes
SHA-256: e4cff24a9ab7ca33b3f7de7404139d7102764dcc801c33078d99bbd22e5307a0

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