Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81283bbfd539575…

MALICIOUS

PDF

53.6 KB Created: 2020-10-22 23:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 9be1f1f5aa7d94e8321b460d75800d64 SHA-1: 802fc5f57ffde63e46a88543f13f07b2976e730b SHA-256: d81283bbfd539575170d525106d5dd2b8b4cbe825bf84831b923980d4cdb3250
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://cctraff.ru/pify?keyword=blade+and+soul+revolution+quest+guide In PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/14d4f3eee25386.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/vizamupi.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/degogedego-dojidetudi-zuwixeva-wedupojopofege.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/1843e913df.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/daxasolizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f8e4a92d4d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f871bd174bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f891e4cde92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f8eb78d0f7cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f8dc3e33a3e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f8f25d65da8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_5f8c7ed176384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8b65eb98232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5f90492f45c44.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000091f4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000091f4.bin)
    • https://cdn.shopify.com/s/files/1/0484/8281/2066/files/21089452325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/cause_effect_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7721/4884/files/liwavojixifanefax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/19707941799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8544/1445/files/remote_desktop_android_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1d81b2-ae72-4836-9852-25ec77030479/wurst_minecraft_1.14.3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa65935b-e0bd-48c1-b47a-82f8e098f77b/genixetulenudivimak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f0c4d4-bcf7-4937-b8d5-3fb81b88bdd5/70150627870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da758eae-031c-41b2-a4af-e5af7690bfbc/53471874769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14c6a50-f8d3-42f6-81eb-423eaa5e8447/balemuwidixitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b58c36-3464-45c2-b53a-531deeff082b/01.10_01_admin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f328d4e0-9e50-465d-975d-56d9b396e856/48_laws_of_power_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c704b2c-27f7-47b9-9a88-e2c67684b0f2/napolubekowiwufiz.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_off000091f4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F4 5228 bytes
SHA-256: a0b47f91fd3c794199a242661739dbb21d635e46b8897e71e8798f8c03554e41
font_01_sfnt_off0000a3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C6 10632 bytes
SHA-256: 480a306c5e39b24ad9a9e3d5415cc1e35fefe1fe4ee416e4c8206775df27d431