Malicious PDF — malware analysis report

Static analysis result for SHA-256 285fe90b7b278794…

MALICIOUS

PDF

41.5 KB Created: 2020-10-15 05:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 441dc233e90f367fd2c1860f028a2649 SHA-1: 46b7f95f911f42dfac204fe7ffb8973b323d3032 SHA-256: 285fe90b7b2787947adaac1368d85fcfbaad27347faded77e3ec2924c997ab89
184 Risk Score

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=soleus+air+lx-140+nt+manual In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/boguxudozoz_kibasosowaxur_xanudota_jawuvopiluvep.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/podox_nilore_karor_sakumanor.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/97862238606.pdfIn PDF document text
    • https://site-1038413.mozfiles.com/files/1038413/kewokurixix.pdfIn PDF document text
    • https://site-1044417.mozfiles.com/files/1044417/dukez.pdfIn PDF document text
    • https://site-1038472.mozfiles.com/files/1038472/memejovuzesa.pdfIn PDF document text
    • https://site-1043878.mozfiles.com/files/1043878/novawiborakesujofu.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/suwowu.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/7777132.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000054e3.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000054e3.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000088a2.bin)
    • https://uploads.strikinglycdn.com/files/5afa4cb3-ae3c-411e-83ed-722b6b62c4cf/turuxexuwerav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e943985-4c9a-4363-9989-2b2b662c2abc/80496100143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeadad09-7d07-4f6e-9059-7bd2df7bb144/84509356493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32337c4d-da70-440f-9c76-eea2f0c0d357/sawufixegukonumefuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/86683324507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2453/0594/files/maytag_bravos_x_washer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5853/0966/files/85944378901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7921/4265/files/sedalia_elementary_school_ky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/letter_formation_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/simple_machines_worksheet_physical_science.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 extracted file (font_00_sfnt_off000054e3.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E3 5196 bytes
SHA-256: 83f5dc4f4a5c6f8c36138177407fcfafb907523bfd798b02f0104b27a11e12b1
font_01_sfnt_off00006681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6681 10116 bytes
SHA-256: a5f8db7c95d3e798a15edc707b8d9ee11725e3cfd8ad0dadf965e4a1298cf0ec
font_02_sfnt_off000088a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c