Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa0ccf0ab18a7bf…

MALICIOUS

PDF

83.3 KB Created: 2021-03-18 19:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ab662130049e241938c011e1a4c28423 SHA-1: 3c68fc678b2c0915785945f13498b2ebba0d90a4 SHA-256: 9fa0ccf0ab18a7bf2fd43ceafa4bbf3af7e642c6ef8e331ce50800aa2d5195b9
194 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The heuristic 'SE_INVOICE_LURE' indicates a payment or invoice pretext, and the ML classifier strongly flags it as malicious. While no scripts were extracted, the presence of many external URLs points towards an attempt to redirect the user to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/wix?keyword=sample+transmittal+letter+for+documents+submission PDF link annotation
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/xunusadavesaso-digufen-xojebanagube-vapavodoli.pdfIn PDF document text
    • https://lepifopinitomo.weebly.com/uploads/1/3/2/6/132696280/bepap.pdfIn PDF document text
    • http://tryplafond.xyz/75892986981omvz1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5fe87c020ff17.pdfIn PDF document text
    • http://onlineeshop24.xyz/nikon_dx_vr_af-s_nikkor_18-140mm5saoq.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/86161928825.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/bewometunamijijegedot.pdfIn PDF document text
    • https://pogosarixuxa.weebly.com/uploads/1/3/0/7/130776079/widojemem-buxatoxusi.pdfIn PDF document text
    • http://openchambre.xyz/love_breakup_pic3tkqv.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/fe5159d69b6f.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/wozetoxej.pdfIn PDF document text
    • https://xawawamofolapus.weebly.com/uploads/1/3/1/4/131436997/5b00e32fa.pdfIn PDF document text
    • https://gasovopur.weebly.com/uploads/1/3/1/4/131453365/vopenitokixin-valizunok.pdfIn PDF document text
    • http://mavogevuz.getenjoyment.net/74561845106.pdfIn PDF document text
    • http://help-verification.com/descargar_diccionario_ingles_espaol_gratis_para_pc_sin_internetuxjra.pdfIn PDF document text
    • https://wiselorasen.weebly.com/uploads/1/3/0/7/130739143/bixerakodegijum_supipuzi.pdfIn PDF document text
    • https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/945388.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/34904439014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_6009cb46aacfd.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/bamakupiruma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluxewamotate.atwebpages.com/antiacidos_permitidos_en_el_embarazo.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_da20e24d6f2b4a69bc46446d8fa0d165.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_5ef953d851a649fda938b494a3186997.pdf?index=trueIn PDF document text
    • https://f2f8a3c9-3ea7-4a25-b7e2-3e2749f32899.filesusr.com/ugd/f0e51d_481836aea270461a950e095eaa06fbb0.pdf?index=trueIn 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
    • 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_off0000f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 5544 bytes
SHA-256: 3d3305d52ff75e4e513fb97ebb24a62d802dba2d610cb5a735d1e1e0d0ae594e
font_01_sfnt_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 10540 bytes
SHA-256: 879e707c7422e99cb9ffa36e36919892b1456278c8cb5f1949336b3a8f75e640
font_02_sfnt_off00012a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A44 16080 bytes
SHA-256: 419589107fc56601c9b04419f17c215e5f14bb407a84c116f10b58ab6236b798

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