Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2eda1a86f71a17…

MALICIOUS

PDF

92.3 KB Created: 2021-09-12 18:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5386251a5c5dc6ac8576fec3d212e356 SHA-1: f7c5e2dd1e45a116e92be4a7d663c8e7029e6658 SHA-256: aa2eda1a86f71a17110130f49795e0c18e36a6e347fc021dac5be1287943cc20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://clubesquilacoma.com/uploads/files/bowefuwibixasoniribakeb.pdf In PDF document text
    • http://thepokeluau.com/uploads/files/sapit.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/goxezamafepikobuxolokop.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/vegokibalelojutuvesava.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/k0agjghbn07sksncns5isvir4t/bonuvawonafekanurake.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/84372380891.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/86428151393.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/29118613096.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631139124.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/bozewapa.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137c1d14be02---65197233094.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/demojojim.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/jowitaxuvoxixubemudizesud.pdfIn PDF document text
    • http://ondamarinarest.com/upload/files/sejusupodos.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/35452039869.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210904140112.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/derajidobipalewul.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/rltelaed69cvrbnpjf31gto3cq/87847464718.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d9886d5b1---71619504325.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/783dda76221b4c9827dcbdd8d070c406/xolivupatexavokivabe.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/bobilevokumiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=hairstyle+according+to+face+shape+menPDF 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_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 18744 bytes
SHA-256: fd48409ac37dd790ab6ecf550688389ead38515069daaf2bc897d87a06afb84e
font_01_sfnt_off00013250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13250 11172 bytes
SHA-256: 976fcf27f2f12e8f2ae00294aadd1d1b2c38e61374bd2f3721e3d8c76fdd3bed
font_02_sfnt_off00014c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1