Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baf4bb54d960af1…

MALICIOUS

PDF

84.7 KB Created: 2021-03-07 04:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 27c0c5285a4e42c6eed6e54e0f45a9df SHA-1: bb26f3c5983159a103f9602697d032f59cb1dcf2 SHA-256: 2baf4bb54d960af17d490db133da5f0512cabbf1678e270136ca82f086113524
126 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/wix?keyword=bissell+proheat+pet+upright+deep+cleaner+manual PDF link annotation
    • http://legendarycraft.ru/how_to_install_vinyl_decals_on_wallsmgx0p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_6023c83a763be.pdfIn PDF document text
    • http://tacfitproducts.com/how_much_does_an_operations_assistant_manager_make_at_dollar_tree79auu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_60027046680c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_6043e69b723cd.pdfIn PDF document text
    • http://ehaberdevlet.com/sinhala_dictionary_offline_appssts0.pdfIn PDF document text
    • http://vezerfa.xyz/wiravo22rwp.pdfIn PDF document text
    • http://vanlit.ru/646398857491q1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497695/normal_5ff10ffe5cea4.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/how_to_make_an_easy_paper_airplanes_step_by_step.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/wovagudodifij.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/what_size_turkey_fits_in_a_18_quart_roaster.pdfIn PDF document text
    • http://tryse.xyz/australian_jobs_report_201971ie0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5ffebe9ba60ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://beliraguw.onlinewebshop.net/what_is_scrum_in_laymans_terms.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_0dfcc8225d2a4324a6de9e69d4b3bd80.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_b58f957acfed4532ba39af28ab4d1429.pdf?index=trueIn PDF document text
    • http://jemileti.atwebpages.com/jikoromof.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_ee4ebbb3ec924135a0a14c7dfbbec709.pdf?index=trueIn PDF document text
    • https://94905bf1-e21c-4e9b-b893-f07ea1e46b09.filesusr.com/ugd/8ff694_68932de15ddb4ca1971cba7fca212856.pdf?index=trueIn PDF document text
    • https://a2b11b7d-65fb-472f-bec3-2eea0e65737f.filesusr.com/ugd/b0b521_dcd0d6e8684248e889b4085dc1f2c47f.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_80be091ad9c442e9bc8535190dad2b18.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_c262efcd8e674ffb9011c3925da0bad3.pdf?index=trueIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_0cc272b1f4484557be9cdde481990791.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA0 5416 bytes
SHA-256: b125f0d75a09d7d17997c4705958baa00f0dbae0ee91870ed3a2b9869e57ec5d
font_01_sfnt_off000111da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 10924 bytes
SHA-256: 556960a733bc449905937f5b291c192d5b6224f8df3c0343129070e214f3953a
font_02_sfnt_off000136b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3