Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46b96b7dfc0593e…

MALICIOUS

PDF

50.7 KB Created: 2020-11-09 03:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d163a23bcd7a9075036c630b9d673fa6 SHA-1: a1991496cd97115abd06f67a79eb7039ea58847b SHA-256: a46b96b7dfc0593e013ed1fa3088f99abead7ba4ede6990c259f40b9590af4e0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?keyword=halloween+basketball+legends+poki In PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/2338989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5f9c2829198e4.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/51b492995ed215.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/627262.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/mokojutuv-bajugajuxadadax.pdfIn PDF document text
    • https://pudarafuweza.weebly.com/uploads/1/3/4/4/134479559/8115121.pdfIn PDF document text
    • https://kigikosofo.weebly.com/uploads/1/3/4/0/134041402/wokawuvutari.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/1e325143087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_5f9a0fa53b9cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/will_disney_app_be_on_roku.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/reader_s_digest_new_fix_it_yourself_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5620 3136 bytes
SHA-256: d7a74a8f7f5b6061d1704e49d55b25e97137b941398fa138ccd077d4d208d331
font_01_sfnt_off0000614c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614C 5288 bytes
SHA-256: 7e3c0a120610ae3e6d567d655a1f64025c3a0fc90ee44c3c156dfe1ae326065a
font_02_sfnt_off00007360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 3952 bytes
SHA-256: 6771ba4582e6cfee8c8bdf4821607eb54162e22c4a168c1788d911294195b359
font_03_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 10816 bytes
SHA-256: bf9ff32aa650335b4fcf501d4d19136cabab24d6070eae8d649ab7cca3790d6c
font_04_sfnt_off0000a813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA813 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb