Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8aad3dc56ecce3a…

MALICIOUS

PDF

92.3 KB Created: 2021-04-26 21:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a70a81e5f4c5ab61279be6950a12eea2 SHA-1: b34fb27971a6347758d303903294a24dece18603 SHA-256: d8aad3dc56ecce3a294ef3ca96722a92b9488996300abce1862f0e7ace334262
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://xezojetit.ru/strik?utm_term=sony+pxw-fs5m2k+pdf PDF link annotation
    • http://jaliwif.22web.org/good_aa_topics_for_meetings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_6043e5329bbba.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/sazavibete.pdfIn PDF document text
    • https://xipazodi.weebly.com/uploads/1/3/4/3/134375507/4713810.pdfIn PDF document text
    • http://muvezada.iblogger.org/tifanubaruzaguwesakafu.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/6f4f342.pdfIn PDF document text
    • http://nagetav.22web.org/rosogusipitafesuv.pdfIn PDF document text
    • https://ratisatemapabuz.weebly.com/uploads/1/3/1/3/131398591/92355b2.pdfIn PDF document text
    • https://pisusafinado.weebly.com/uploads/1/3/4/3/134363103/568605e.pdfIn PDF document text
    • http://fetidasobi.iblogger.org/le_journal_el_khabar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_6064e9558463f.pdfIn PDF document text
    • http://xabigaxen.22web.org/verizon_router_default_ip_address.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tasowivi.epizy.com/77853507731.pdfIn PDF document text
    • http://gomirisepu.epizy.com/girekenumalat.pdfIn PDF document text
    • http://demajipo.rf.gd/toxakijev.pdfIn PDF document text
    • http://ruzizoxotawuva.epizy.com/44016859272.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_5bf0793faf824b368a66a2419ef17819.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_d2b257c79195467690b99597b541c2f3.pdf?index=trueIn PDF document text
    • http://rugokabiko.epizy.com/46561810959.pdfIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_fb877541e77e4c8cbdd2e6737fb59eb2.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_cbf6bc083c47441689ac1507d902ce1d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 5108 bytes
SHA-256: 853ec8b48741f0911b71b3c49cb16e2b7dc59ec7173cdd0766227bc8715233fd
font_01_sfnt_off00012802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12802 13200 bytes
SHA-256: a167bb13d7dfafe7634614b8f4189e8484f805f3be14e82cd077360d69165455
font_02_sfnt_off00015454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15454 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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