Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa698dbf6123383…

MALICIOUS

PDF

84.1 KB Created: 2021-04-02 05:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bddbd363e501d931d9c73c9d6d2b3b14 SHA-1: e9bfb79b61e1834b6b40f6dd46c91cf003220b64 SHA-256: 8aa698dbf61233839cea01f3e0af2b540cd6ae839c4ee1eb881b7f795b53b2f8
134 Risk Score

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. It uses an invoice-themed lure. 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 0.9990

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 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://soxebez.ru/strik?utm_term=freelance+academic+writing+jobs+online+india PDF link annotation
    • http://gakawisogafuga.mygamesonline.org/hp_envy_4500_ink_cartridges_asda.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/red_bus_ticket_format_in_download.pdfIn PDF document text
    • https://pamesatigifimes.weebly.com/uploads/1/3/4/6/134639420/towagojusikot_rabiwekagasafek_regorum_movid.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/bisection_method_solved_examples.pdfIn PDF document text
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/e0edc237019.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/vusejem.pdfIn PDF document text
    • https://nofuzuvovakiba.weebly.com/uploads/1/3/1/3/131379181/bfad989e54.pdfIn PDF document text
    • https://bufogepuvuzi.weebly.com/uploads/1/3/1/3/131381066/dewugevit.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/vitixuwiwitaduj.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/9909531.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
    • https://uploads.strikinglycdn.com/files/cce7cb9d-703e-49d5-8d7a-c65f6630ead8/the_chronicles_of_narnia_the_silver_chair_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/xegujibibuberimaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3203d8b0-5d23-4b37-848b-007e80f8b026/is_gdp_the_national_income.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8fc747-a5dd-46a4-aaeb-633a68663563/samsung_dishwasher_dmt800rhs_parts_diagram.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/performance_appraisal_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/vabigidekolamanenakuxes.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/68514845376.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_30f7921bafb84290a8865a42eff06b46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5902dcd-d9ee-436e-abdf-1e84cb535011/segejizisojofagewiza.pdfIn PDF document text
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_2634b44b94014bbebcc20fb81bd72fd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3098d933-0ad7-44d4-a5f2-f86cd7b3d45a/48936827449.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/5060463847.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/7766685709.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_fb8c975b9af84f02b73f77252ab8781f.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_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 5308 bytes
SHA-256: 0eb40d89eed35e6e5558c5807f34dea1c71de14f52114c7091d3c891cded0bfb
font_01_sfnt_off00010da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA8 11684 bytes
SHA-256: 17607fa8a0fd0612a4e985569c0a46b4384108f79d6cf1959a42b77541ce3720
font_02_sfnt_off000134b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f