Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39e88c6ce87ee31…

MALICIOUS

PDF

69.4 KB Created: 2021-03-18 11:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 69ce6855d8685d07b65b58d9e48f34c4 SHA-1: d8968af65687a0ab86ca9dd7e7ce3dc291907bc3 SHA-256: a39e88c6ce87ee3182b4059cd84b33160796055916baf0621108f5da3d2fefba
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URI pointing to a suspicious domain, which is likely intended to host malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to distribute or redirect users. No scripts were extracted, but the overall structure and embedded URI strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/wix?keyword=2006+ap+psychology+free+response+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450044/normal_6029869342258.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/eMibhdj/vepenabulubatulemogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_6021f8e769d54.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/dikopike.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/gjghhdK/stickman_rope_hero_mod_apk_2.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/768970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409257/normal_60374f874b9a8.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/YIjicr8/500_words_bronze_winners_2019.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/7b292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff2f838-4406-4085-b041-7c9fdd268c92/92174577101.pdfIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_29457c9d948a4d7384e47e117832095f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a662c4af-968b-49b7-80de-5a6c83e0918c/hoover_t-series_windtunnel_pet_upright_vacuum_uh70210.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/sobuzobitofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b56b474-3b93-4964-ae78-8e9fa52850cf/trigonometric_formula_for_area_of_a_triangle.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_a0ba09f2bef04c17b0a044b131677e03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/23042909903.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_24b26592d51d4cf2911b21b8e6c782fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9055cbc-a06f-421a-b64f-9f2820f9d43a/vans_ua_old_skool_platform_checkerboard.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_0e36b71fe6d843b3bd00469a3e4ec7e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/impetus_gurukul_nda_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6416b3d5-7413-4111-b354-e64ff434daaf/cant_install_mendeley_word_plugin.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_off0000ce55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE55 5804 bytes
SHA-256: 25a474950f450bddc1d33d817219bc39f9b7b314fc4f4b6cf737da5db29dea40
font_01_sfnt_off0000e22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22F 10608 bytes
SHA-256: 7f4b44aca040e96fdbb2ba9f25e6311ad99af9e14ee4b7b2c4e78989e4edb624

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