Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaddcc50b53b5f4b…

MALICIOUS

PDF

82.4 KB Created: 2021-03-09 07:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 258b2767570d4c9e9ed023a0cef98230 SHA-1: 041bc1ce9f31c290749d079a8f8ce6ddd6097612 SHA-256: aaddcc50b53b5f4b4260a008025016895bfc25106ebd9c7770d9fa61e29d62a3
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The primary external URI points to a suspicious domain, likely intended to host malicious content or redirect the user. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://maypoin.ru/aws?utm_term=who+is+the+poorest+man+in+nigeria PDF link annotation
    • http://dazinifuxevoji.22web.org/501974063.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/kiwezixufev.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/mejaguf.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/navy_advancement_results_2019_cycle_244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxulija/hp_cp1215_printer_specifications.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/2546832142.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/bee_er_free_for_pc.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_9c1cce232c40405f8d2f7bfe97ed78ff.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_dd60f925a6de4312a4bb9734d2df23c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petubapizo/74449866643.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/benchmark_computer_performance_online.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/digestione_proteine.pdfIn PDF document text
    • http://jawozamamopenis.rf.gd/pdf_from_safari_books_online_free.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_9e41613e0bfd488489686443af16362a.pdf?index=trueIn PDF document text
    • http://bejuxufuvojofa.rf.gd/39391620526.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/33229059938.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/16857619509.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/ruvofidowaf.pdfIn PDF document text
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_56934d5fd7aa4683897c4ebf85c71ba1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/passive_all_tenses_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/3077196381.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_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 5212 bytes
SHA-256: 9bfd13c1608d71ae79b0bdccd39ef0b27678b71d8e1a14ef89bf06bde7ccc1a3
font_01_sfnt_off00011548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11548 11364 bytes
SHA-256: c12e30d6d64e02c37bd8a710f11af48690f1aa024a283f56fdb306d4bd1e7f6a

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