Malicious PDF — malware analysis report

Static analysis result for SHA-256 5116ae0e327bc546…

MALICIOUS

PDF

79.0 KB Created: 2021-03-04 14:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b39925a1a7b94ab13742ef8490cfbc24 SHA-1: 4e8b553b306341e50ed6081bc01297d1c8bc2511 SHA-256: 5116ae0e327bc5469f2a7ba57001061188e42ba16d7ef83dfaf68d71c06bc1de
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=take+me+back+to+the+night+lyrics PDF link annotation
    • https://cdn.sqhk.co/rabataxuvax/JijGHig/wilderness_survival_kit_list.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/795838671b4587.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/eif1foO/28677775294.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/2zia4hi/powovemomanuneginorafemi.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/d62bd16381c.pdfIn PDF document text
    • https://gopiwalugase.weebly.com/uploads/1/3/0/7/130738825/tekokofaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/buweworipoza/pveI3jf/neon_snake_print_clutch_bag.pdfIn PDF document text
    • https://cdn.sqhk.co/wewidipo/gFhhhfb/43129073284.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/ac9525def8.pdfIn PDF document text
    • https://garupiripo.weebly.com/uploads/1/3/4/3/134386314/3f963e99461.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/isviijh/44979395515.pdfIn PDF document text
    • http://roverebi.22web.org/pediatric_blunt_abdominal_trauma_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/SjdlQib/primark_online_shopping_uk_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_7132d2ca4681431d8b752b2fb3a518eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/pumarijijupibo.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_e39531f99b80471eaabf9a7a58f8a72c.pdf?index=trueIn PDF document text
    • http://desekipodepi.epizy.com/bufovosivu.pdfIn PDF document text
    • http://jibavorom.rf.gd/why_do_i_get_a_warm_fuzzy_feeling.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/android_apps_games_live_wallpaper.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_50caa449eee94e4a96f78a60426896ea.pdf?index=trueIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_30e8d399cee14b48a23b50b768020df8.pdf?index=trueIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_0376f34d286e4053a4b96a6a8083ff8b.pdf?index=trueIn PDF document text
    • http://gelapuduwo.epizy.com/canons_of_dort_reformed.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/gewhnliche_platane_blattform.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_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 5468 bytes
SHA-256: 43fffbabf6f2f4f461461d12ddadfa849e951c3f60d8c53acf74ffb58cbd0c24
font_01_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 10480 bytes
SHA-256: b4d79f827cdbeded68bdabe1b9bcb84bde91de6ccabb48c0fa4823e08d2a6873