Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec7bdd802d54c0f…

MALICIOUS

PDF

48.7 KB Created: 2020-10-26 22:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6df863ad5fa41c987e4e17ad5c11f87a SHA-1: 34f07b82d7c430a0f997f2e6fa964d0237e4ce78 SHA-256: 7ec7bdd802d54c0f73446e09ee2a6113cfdd597c1987a015344ee108790e383a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The heuristic firings indicate it is a malicious redirector and a link farm, suggesting its purpose is to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=yamaha+rxv573+owner%2527s+manual In PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/0bb033.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/6f8b2abf3cb.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/7601714.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/6125654.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/tapugew.pdfIn PDF document text
    • https://gefelamanak.weebly.com/uploads/1/3/4/3/134353999/mifogidifikimebido.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/gowokefisoxenu_nigirozufekagok_wenujojuxas.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/cf7c6383-0d12-4eba-b2cf-d870aca5a070/41806191615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad4bfbd-9103-43f2-9c4b-939441e190fb/solarian_guide_starfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e274cd28-cbf3-4e89-bfbf-05f00cfdaffb/nelizanesogap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3b80e9-1f4f-4c20-9b35-497ece2343c4/tobig.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/gamolisote.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/fezibikugekeze.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/67827608622.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/january_2019_to_august_2019_current_affairs_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/44361046858.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/baguio_tourist_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5264 bytes
SHA-256: ef42088697ec00120684ce0992426728dfdcdc7e1e2c2f1dfbb822ea793c502d
font_01_sfnt_off00007f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F79 11968 bytes
SHA-256: abe238b0442df6c0bfbc5f1d3fb57000259f6eb9adb0bef3f4979f56d8671ce2
font_02_sfnt_off0000a7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7EB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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