Malicious PDF — malware analysis report

Static analysis result for SHA-256 183c17d6ae2f7f5a…

MALICIOUS

PDF

79.0 KB Created: 2021-05-13 12:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 02b5c877e44f4fb4ca16524ce538d09f SHA-1: 092434fb17689e6e72750016f0bd3ff8d3f4b5a2 SHA-256: 183c17d6ae2f7f5a9ab944b29d364399584e52022bf8a96e770b06478b84052d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are on disposable hosting and utilize UTM parameters, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jottigo.ru/strik?utm_term=darren+hardy+net+worth PDF link annotation
    • http://wowitaly.space/3404909362hq7ys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476432/normal_6003493913b07.pdfIn PDF document text
    • http://myshoes.moscow/the_maze_runner_2014_movie_in_hindi_download_480pcxloq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483362/normal_600f5d293af40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_5fdaf9270d152.pdfIn PDF document text
    • http://todurodadol.iblogger.org/kisobidik.pdfIn PDF document text
    • http://segway-wheelchair.ru/80246500522h817d.pdfIn PDF document text
    • http://wozufilugud.iblogger.org/37194301212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486772/normal_5fc9cc667dc91.pdfIn PDF document text
    • http://paksorond.xyz/27245410091xksw1.pdfIn PDF document text
    • http://masajsalonunuz.com/is_accu_chek_performa_discontinued2dcbk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_6054cdb72065f.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/213628b1-e588-4781-bc6c-026befb7ed6f/go_lean_six_sigma_green_belt_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254d4c3b-b6ca-42ff-a5b7-f1e3d492ca79/what_does_it_mean_to_be_a_child_of_god_in_the_bible.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_7862fcca341146dbbb872dfb920718ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7149793d-db58-4ff1-88fc-a17b3eda87b4/17845379612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe703ec-7790-4736-9258-e3091eb1a995/whirlpool_wmh31017as_microwave_oven_light_bulb.pdfIn PDF document text
    • http://jepisaf.epizy.com/vsco_full_pack_android_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e1c288-bc9b-4d36-aa18-f2822b2a2c0b/blue_dapple_dachshund_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c86f90-ab31-4ae9-a6de-aaa73deb8e24/99954550664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5246853-1c55-41ca-a502-3ae5f1b37c1e/easy_blues_guitar_riffs_tabs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f6b59c-dc99-4b83-9fc2-e5c75509fa38/laviwepabetas.pdfIn PDF document text
    • http://wavuxab.epizy.com/ocean_animals_coloring_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b08248-110d-4830-845e-23731f4ef60a/72629539013.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/morisowoxusin.pdfIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_4950e427cd42444cb4c0422dfe81c32c.pdf?index=trueIn 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_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 4896 bytes
SHA-256: 1f6fde206635fb2ea03b3fa70cf9f96092624b01bef59d4e8a3393d145fcdd85
font_01_sfnt_off0001084e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 11060 bytes
SHA-256: b0182471591ea49405712b6d193d8b6a162925c26caaaf3970a0a8ed3544c695

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