Malicious PDF — malware analysis report

Static analysis result for SHA-256 0878fb0583a11a19…

MALICIOUS

PDF

53.9 KB Created: 2020-10-23 23:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eae23390e018e57e331c56f36587dba8 SHA-1: 0d4156601e70616fe24540f83a59c9ffe0463d6b SHA-256: 0878fb0583a11a19f4f931fbc5466fc2434129c88669acbbe56558cee319851a
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.club/pify?keyword=skillet+awake+and+alive+mp3+wapka In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f920a9152a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8e4f1692727.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/8b92a0d095201ba.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/74cef76d27b2ad.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/7911124.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/8571776.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/rajixufabo.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/c2981cbe51e8ae0.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/93755988-b620-4e87-a7b3-990cf484fc2d/99252929959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9eec52b-7941-49ef-be72-2d8a56c912b1/jisofurumomeluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bc9c88-c1df-4a58-8d28-c645861b89c5/60547020969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9911e0f8-e700-47b9-993e-11c2e1493f7a/28484708133.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/single_variable_essential_calculus_early_transcendentals_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/bob_s_steak_and_chop_house_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/asfixia_libro_alex_mirez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7d9086-f466-4361-8947-47e2247b1994/7182643938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5bfbd5-0477-497c-bd98-161c5769b808/bewuboxifefunuxabomin.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009f72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F72 23328 bytes
SHA-256: e41ff3a46c2c650b70cdd9dc8ca8a6367d01e305e1bc1361853414d574b79e25
font_00_sfnt_off00006769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6769 5312 bytes
SHA-256: 4eeec723c82f860ee53713d9af45ec8cecbfe7db251ff1ddae785a51c9722093
font_01_sfnt_off0000798e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 10968 bytes
SHA-256: f3c1b2473c3ff0de2727552e4bbb55277a662ac0283402a72bf9a0b57312a0f2

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