Malicious PDF — malware analysis report

Static analysis result for SHA-256 055dbbf5c3c907c8…

MALICIOUS

PDF

75.3 KB Created: 2021-04-23 01:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7ec1d06a8e6c8c4d4e3fbcdda73d81af SHA-1: 20bf08b2ad592ab1c9a2cf7e44368c0d43eb16dc SHA-256: 055dbbf5c3c907c81eae7746cf63f34a0192d2d4b6195794bb484af10f587ba3
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is classified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a document, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=the+boy+in+the+striped+pyjamas+free+movie+online PDF link annotation
    • http://lnstagramverifiedsbadgeform.com/how_to_troubleshoot_an_rv_ac_unitlh5nt.pdfIn PDF document text
    • http://euromarket.pro/how_to_clean_with_bissell_proheata1hgo.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/Qwjahae/39748275889.pdfIn PDF document text
    • http://koprovk.xyz/45611992383mh7sm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_6065e9bb0a616.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5fff1f16e3f13.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/hhhgifc/the_alchemist_code_film.pdfIn PDF document text
    • http://padlamadla.site/login_page_template_in_android_with_codeiy1nz.pdfIn PDF document text
    • https://cdn.sqhk.co/xivorotil/xThghhd/39878168685.pdfIn PDF document text
    • https://cdn.sqhk.co/kirinitaxuk/RhiP0Zf/the_triple_entente_is_formed_between_france_britain.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/wibajigalorugawominulik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5ff580395989f.pdfIn PDF document text
    • http://mxbur.fun/el_sueo_de_una_noche_de_verano_william_shakespeare7qnyi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367625/normal_5febacc01e3cd.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/084a228d-0628-45d8-a0ba-8734f944f1cd/what_is_meant_by_the_word_social_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e383e676-b55a-45b8-b656-58f36eaee29b/5311375474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e17333-e3cc-4a5b-adeb-a92046dad699/diduritolatedikutobuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce72e0ba-4182-41c7-a742-fadb354fb8e4/furaritezulimusuwume.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/ps_vita_lowest_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83b73f1-b503-40a5-855e-f2e0e7642d82/70208075517.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_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 5608 bytes
SHA-256: 851f7aed5612f420ef9fcf264d61a5f1c947a2386cc227d7a0cc11ff1f7ac805
font_01_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 10684 bytes
SHA-256: 0e18d27e83a059f49e406ef1c6028ccc706452f84dcc70c4773ccf0ba9399c4a

Open this report in the interactive analyzer, or submit your own file for analysis.