Malicious PDF — malware analysis report

Static analysis result for SHA-256 30acd15f70a58f3e…

MALICIOUS

PDF

79.1 KB Created: 2021-04-12 02:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 02728b5344d8d02f3a2cae266c07dbd3 SHA-1: c4aabb226d915d4adb96bc7299c5a8ddde071854 SHA-256: 30acd15f70a58f3e72a3a43be9b86db83d720695cde74f5a82f5d15043aee828
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=rca+home+theater+sound+bar+rts739bws PDF link annotation
    • https://zisovubuzuteb.weebly.com/uploads/1/3/6/0/136086112/146234.pdfIn PDF document text
    • https://desotidibig.weebly.com/uploads/1/3/0/7/130775813/41f9c1e9d62c64.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/6115340.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/5276170.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/ee6e5eb3a48.pdfIn PDF document text
    • https://nunodovov.weebly.com/uploads/1/3/1/3/131380210/18a1c8f.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/zexomewagurub.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/fikoviviga.pdfIn PDF document text
    • http://xifamopituwoti.iblogger.org/samurai_sudoku.pdfIn PDF document text
    • https://tadarumoroje.weebly.com/uploads/1/3/4/7/134724086/d7a794b271eaa.pdfIn PDF document text
    • http://xenuven.22web.org/business_model_canvas.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/5fdc3017a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_96a2cd6b84d444c984c1ba049db0adaa.pdf?index=trueIn PDF document text
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_efaa27db665d4cde9a17e01cbca89b6f.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_738d13d1a3754fdba97e35ee1bc4460e.pdf?index=trueIn PDF document text
    • https://a01f0313-f680-4530-87a9-ce77a10bb621.filesusr.com/ugd/ac0554_ffb471c44ae34e4a8181e08ac605110c.pdf?index=trueIn PDF document text
    • http://dazejifudora.onlinewebshop.net/96766238297.pdfIn PDF document text
    • http://figijosi.epizy.com/how_to_write_profile_summary_in_resume_for_freshers.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_e4bd757937b34c488e48a0a4ffb2f6c8.pdf?index=trueIn PDF document text
    • http://nununad.myartsonline.com/95132307603.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/silver_dapple_horse_color.pdfIn PDF document text
    • http://malutekamu.rf.gd/gmail_attachments_in_bulk.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 5788 bytes
SHA-256: 53180204c7a2bd8e3854c89863efa31dea489e46407c8bed8b8c28eabab22ad3
font_01_sfnt_off0001093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 11140 bytes
SHA-256: 998d5c4cf844be92a7756e6f29039c92d8dfed579cb6b7840f676ede126d7939