Malicious PDF — malware analysis report

Static analysis result for SHA-256 28dab032a98639c2…

MALICIOUS

PDF

52.4 KB Created: 2020-10-16 15:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 03005bf952532022213a7afd4f78225d SHA-1: 6a3e111daccf010857ee448bc87c06bc89023889 SHA-256: 28dab032a98639c29ba655599c38b54b2c4ac7bc54787571847355fe1bcde77e
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://ggtraff.ru/123?keyword=how+to+use+bundletool+android In PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/225f86e.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/batug.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/natemufive.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/lanidufo_divop.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/vowes_gogukugujiw_dejodoxezi.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/1436272.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/7229121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9559/1574/files/33832036928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/icon_of_the_triumph_of_orthodoxy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/fuvaninaxumadawali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f169a0-a7e0-4db3-8911-10cf094bdbd4/24459296114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeea35eb-aff5-4d6c-8f45-c245d026a887/tukidovogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/chemistry_density_problems_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/gregg_hurwitz_books_ranked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6855/0037/files/clone_tool_gimp_mac.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_off00009089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9089 5012 bytes
SHA-256: 94727931467bee5c9e15b5641b11a7c701ade825776800b66cf0ed99176b7182
font_01_sfnt_off0000a1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A5 10192 bytes
SHA-256: b0d9ad62eb73402b753ccb05dce1315de98aa8a7624676ebf2cb4b23ae35eed0

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