Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5562b106115a428…

MALICIOUS

PDF

76.1 KB Created: 2021-06-04 02:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 90c207cca955f7ea861c8a21d0bb645e SHA-1: 64bb0d13738e3a21ab634b6451aa502f771708d9 SHA-256: e5562b106115a42816793175d4bed186b7d5039f5d226d9236488d61b5a99c60
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or link-farming campaign. It contains numerous embedded URLs, many pointing to disposable hosting services, designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent, aiming to obscure the ultimate destination of the user's click. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://medvor.ru/pbw?utm_term=hot+girl+voice+changer+pc PDF link annotation
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/woveze_kudixekugiruke.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/4206884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_601f3a0aaeb49.pdfIn PDF document text
    • https://niburisugop.weebly.com/uploads/1/3/6/0/136082965/2421973.pdfIn PDF document text
    • https://liziruji.weebly.com/uploads/1/3/4/3/134380663/ritojekajezad.pdfIn PDF document text
    • https://rituzanasalu.weebly.com/uploads/1/3/4/7/134718781/853c1a41.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/jixaluzebuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_60398156d23ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_60b95dafbb6d2.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/17c21fbb-5420-4a8e-abbf-2f0b4710cdc0/buruvugelukiruk.pdfIn PDF document text
    • http://garewewaziwu.pbworks.com/f/how_to_get_a_voice_changer_on_xbox_one_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df41100-a465-4c95-b0d2-500a40f57975/mijerirewimenibomutof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be21a98-10c2-46e8-b79a-ac55e4a1a562/how_to_clean_speed_queen_dryer_vent.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144448962/fedapiwelulitomew.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/w/file/fetch/144581301/kamyab_jawan_loan_scheme_online_apply.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/wetonabinadalebogekefered.pdfIn PDF document text
    • http://wiliser.pbworks.com/w/file/fetch/144474945/16286210605.pdfIn PDF document text
    • http://gufabewa.pbworks.com/f/how_to_get_free_rp_in_lol_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26d0bb8-f73d-42d8-9f76-ed023aa0978c/36561536519.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144474387/.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_off0000e632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE632 5040 bytes
SHA-256: 684425c1b0f8b67cdb91ae3e0ca45e214fbb290e2192b40538e718673d4d6ac7
font_01_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 12952 bytes
SHA-256: 06f9387f0c50c47fccc329365717f4912168d5c0b434be918d67fe73d5086cee

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