Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bd39402613b71e…

MALICIOUS

PDF

50.5 KB Created: 2020-10-18 16:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9c9fd6ae1eff6d9070b0c09533bc566e SHA-1: b19d9e67d07f6eddfa61fbacb1c3805f694d3634 SHA-256: 12bd39402613b71ef80353c30d59fe9791cb3c4a923622706fda68f21043d245
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another noted a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The document body itself contains obfuscated text and URLs, including the malicious redirector and several Weebly-hosted PDFs, indicating an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=hp+95lx+palmtop+pc+manual In PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/tarafapebod.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/voxotu.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/vefodajopavokudojo.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/dowomaxaviri.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/cb4b0029.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/gefup_kimubapodevig_wuxexim_dufati.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/pizemawozabiwi.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/pogedemuboxosoz-gakivetatox.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/bopajuporagixinufu.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/7acf29fbf.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/8217143.pdfIn PDF document text
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/lutapabil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f8759b01409e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f87887349092.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://cdn.shopify.com/s/files/1/0431/4365/9677/files/99316372379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/geometry_worksheets_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/spiderman_car_seat_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3218/4485/files/building_winning_algorithmic_trading_systems.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_off00007721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7721 4828 bytes
SHA-256: 864cd8c72dc17882dab0816412012b9e516edf2626503abf7c3b4437e8724f12
font_01_sfnt_off00008779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 11548 bytes
SHA-256: d9fdfb7484ee37fcbc563e4ce67bffcc8c1c8b1349323dcccab51d61e30c6b93
font_02_sfnt_off0000aef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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