Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d25492599c2f9f…

MALICIOUS

PDF

37.2 KB Created: 2020-10-28 01:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f78a23e92f56764405f382653fbd9c8d SHA-1: 08bd81c9f036e15ad60e1279b725d1cbc1127c94 SHA-256: 35d25492599c2f9f15f58df812096c667df79947cd8f6362661f9b08dfff5dc1
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://ttraff.me/123?keyword=kreg+drill+guide In PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/fufirenovumela_nojav_wigewofoxurerim.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/xokobew_mavefubowubijus_rebuniwumawanom_vufisojufekaj.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/6551282.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/2573159.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/13fc2c8b.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/f26bc9.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/afd91.pdfIn PDF document text
    • https://zurukuwimuso.weebly.com/uploads/1/3/4/3/134325804/gusimap_rubetep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f8882643b935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8a5c8e7ccef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5f98a2c82f440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f989b3bda8e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8d70a02d7ae.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/1/0434/0521/3854/files/2004_ford_f150_transmission_fluid_capacity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8819/9332/files/zinosunuwasewukipisarunil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8342/4440/files/fifty-four_devils_the_art__folklore_of_fortune-telling_with_playing_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/one_way_anova_test.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/660582272.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_off00004850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4850 4160 bytes
SHA-256: 810f91c1abe464d14c530b750c5ceafed8e09380dddfe037820011659c539567
font_01_sfnt_off0000566f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566F 10304 bytes
SHA-256: b886529cbe916428d7674ceedcf1a9ecfa886310b11f2abb5e5615587de9d8ac
font_02_sfnt_off000079bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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