Malicious PDF — malware analysis report

Static analysis result for SHA-256 619d937c16a35c3d…

MALICIOUS

PDF

101.9 KB Created: 2021-03-19 08:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a83b0f041c045aefb39e9072564b6126 SHA-1: 5e774a16a89fc451d74115e11633349e80c9faa0 SHA-256: 619d937c16a35c3d7040e53ebd343ceb775891227fbfe613bdbacf4428accfc5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://seumenha.ru/wix?keyword=trapezoid+practice+worksheet+answers PDF link annotation
    • http://moxawunanenubop.sportsontheweb.net/sotodubum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_600087cd7e0ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_60103b6c6ef36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492588/normal_60289c6510a6b.pdfIn PDF document text
    • http://shop-profildoors.ru/kreepy_krauly_pool_cleaner_replacement_partsudawd.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/27316042318.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/433411865.pdfIn PDF document text
    • http://gigezojiradof.scienceontheweb.net/59105170037.pdfIn PDF document text
    • http://everydayy.fun/american_government_textbook_answers8fma6.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/hchdNtQ/dujizanuzexez.pdfIn PDF document text
    • http://meriline.store/underground_wallpaper_4k_hd_sans_friskin6qr3m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458628/normal_603f94307fd56.pdfIn PDF document text
    • https://cdn.sqhk.co/sufipuxifemo/aiFjimP/ps4_hori_tactical_assault_commander_keypad_mouse_controller.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/towafoken.pdfIn PDF document text
    • https://cdn.sqhk.co/wejuladuke/oh9feie/53223970416.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/gofevifuguvuvu.pdfIn PDF document text
    • http://youralteragoods.com/what_genre_is_dystopian_literatureu18iq.pdfIn PDF document text
    • http://svoytrylend.xyz/rolirugevilzu.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/ibgejfU/nasafajope.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/fosagoba/43538244719.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/logitech_z623_settings.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/29304033002.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/27303952244.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/palelenizidupezor.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/18954300636.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A08 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off00015403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15403 5284 bytes
SHA-256: 8311d74aab2cea4f867f9d64fe1b1997f2c5e38cf4b9ec05a52fb7f540058273
font_02_sfnt_off00016611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16611 10440 bytes
SHA-256: 727d119e9adf02e1ee0e95eb3252cbae0856b6467b5b8def4815c53c1c6b1d26

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