Malicious PDF — malware analysis report

Static analysis result for SHA-256 0928edfa461a2c63…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 19:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7fda0e4fc7a6f1cf389f02bae7bb6a27 SHA-1: 2d2e06f1fa706f5b511dd9554b211520b17bbde7 SHA-256: 0928edfa461a2c632d3c7656d2e1ed83db61c99df776941ab9bed9976b7c9287
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://maypoin.ru/award?keyword=livro+biotecnologia+industrial+volume+3+pdf PDF link annotation
    • http://gisujug.mypressonline.com/zilememotibigikatukipi.pdfIn PDF document text
    • https://budogifu.weebly.com/uploads/1/3/0/8/130874026/4fdcf9.pdfIn PDF document text
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/626762.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/59126136027.pdfIn PDF document text
    • https://tosafesixagosug.weebly.com/uploads/1/3/1/3/131383933/xigeke_jotik.pdfIn PDF document text
    • https://cdn.sqhk.co/lijusute/itsidkj/wacom_drawing_software_for_mac.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/jumabujazunive.pdfIn PDF document text
    • https://gerogebu.weebly.com/uploads/1/3/1/6/131637886/rutavazik.pdfIn PDF document text
    • http://kutegexuwudaro.getenjoyment.net/vaxakunasefaweb.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/hjDfhih/map_paradise_island_bahamas_atlantis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_134bf1c3724b48198386e72541527dc6.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_f16457e4cee84ffda4120de1bb364d7b.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_35d95b5ac85c42bc9feceb3ea3b35d14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5f8765-8684-4544-ab42-a46ebb217a2e/how_to_calculate_interest_due_on_a_loan.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_d0603b3958a441d8843df40a178995ce.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_b4a5974866da4eb483286d2408e02f0d.pdf?index=trueIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_6d54bde961554bd2b0f7d634af774c2c.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_e419b13cf727452aa7da064fbae486ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae98b9a-a2f5-49e4-be5d-9566356b96f2/quotes_from_diary_of_a_wimpy_kid_the_ugly_truth.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5780 bytes
SHA-256: 39e5ae24b94f90335ebc4d239cbdcfaca876f2171a5f7ffeeed4869bc4b7a3e0
font_01_sfnt_off0001042f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 13840 bytes
SHA-256: 75701c9c234dfaee386f4d83382c613fc7863e4b9803586216ec0e1939660eb8

Open this report in the interactive analyzer, or submit your own file for analysis.