Malicious PDF — malware analysis report

Static analysis result for SHA-256 934467b0bbdae9a9…

MALICIOUS

PDF

76.6 KB Created: 2021-03-16 00:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: abd1bf075754f5cf60d44ef8a8734469 SHA-1: 9b7dcf7ba91470a9912b181040231e12defdcee2 SHA-256: 934467b0bbdae9a91c737150a476a7232f95efdbd4067d54a3c05db28e0b8f81
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://gimoguvi.ru/123?utm_term=bassinet+fitted+sheet PDF link annotation
    • https://xupemapimosow.weebly.com/uploads/1/3/0/7/130776757/2611ea570a0c6d.pdfIn PDF document text
    • https://juzasofudabin.weebly.com/uploads/1/3/0/7/130775050/6a16c.pdfIn PDF document text
    • http://sexedate69.site/game_of_thrones_book_read_onliner57r4.pdfIn PDF document text
    • http://argo-tourism.com/445597778355vgoj.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/32775314275.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/jesubakisewuzedur.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/ac06fc9ec6.pdfIn PDF document text
    • https://daxolefuziru.weebly.com/uploads/1/3/5/9/135963055/6076210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_4993115e786d4b75836a16af06e03abf.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_91832e47845b454c82e7c52ee08f71b6.pdf?index=trueIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_23fa102eaff045a3840ddacd78450122.pdf?index=trueIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_8bcf771221d24d4083137d7ecff0123e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/656b1217-841c-4152-adbf-21330e46d9d1/mezixemibilofujubadeb.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_89d2e71f8dc64167bba3778844568fb3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/745379b5-2c12-4630-8310-5eabb6603d10/70110968300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58af000-6c45-46de-b201-672a06d4532f/cisco_networking_fundamentals_final_exam_answers.pdfIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_275b8600ee5c4c2aaca00f058cfd7244.pdf?index=trueIn PDF document text
    • https://4b52a32b-134a-4729-a2b8-f16537e28c4f.filesusr.com/ugd/738632_183fd75e539d4b64b7e2e52fc9c3ffd9.pdf?index=trueIn PDF document text
    • http://roveramo.atwebpages.com/gipusozivuf.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_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 4916 bytes
SHA-256: 9b4dfa2e76590d2323cb24a8b4d74e5f7c5efc0ff7269d98716699a80204153b
font_01_sfnt_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 11252 bytes
SHA-256: 43921916d680cb0f37943d8ba008abf9f282774cca7fd789b89c15a00d884e01

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