Malicious PDF — malware analysis report

Static analysis result for SHA-256 068047d1f6c2f5a7…

MALICIOUS

PDF

74.5 KB Created: 2021-03-10 14:34:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e25b183c7e3c8309eb1cfad6309e31a4 SHA-1: c88f217d0beca950b0e9c4fd8e43d9532192978a SHA-256: 068047d1f6c2f5a784743c62d41d7b7ab62c09a2b547a313cf58b3f501528ca3
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading further malware or engaging in phishing. No scripts were extracted, but the presence of numerous suspicious URLs points to a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/award?keyword=affinity+chromatography+pdf+download PDF link annotation
    • http://foselosen.sportsontheweb.net/why_my_car_subwoofer_is_not_working.pdfIn PDF document text
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/241091.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/34412281231f8q0b.pdfIn PDF document text
    • https://moxizeza.weebly.com/uploads/1/3/3/9/133999163/a0609d6e96.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/42678301700.pdfIn PDF document text
    • http://itdiscount.info/zunudagkca9b.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/29669321333.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/26872623484.pdfIn PDF document text
    • https://vuvudosav.weebly.com/uploads/1/3/4/5/134579130/9ad35f0e1.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/python_dictionary_get_key_value_tupleb0yiw.pdfIn PDF document text
    • https://sapefesoj.weebly.com/uploads/1/3/1/4/131453354/sazikewurupuvogudok.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/cursos_de_ingles_en_college_new_york.pdfIn PDF document text
    • http://copyright-security-ig.com/morijowenjt26k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_2ea2766274104d1ba2329e8ee48d8263.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a34f241-7c22-49f3-9640-05fca0dd07d6/what_are_good_active_listening_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5480b1b3-ccda-427a-9692-0ea0bce0da27/lirudewegomadis.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/how_to_get_rid_of_pimple_marks_on_face_quickly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fef8b90-984b-42dc-8249-f85521c04cce/made_to_stick_book_in_hindi.pdfIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_7f18266882014aeba6e57fbad0207cfd.pdf?index=trueIn PDF document text
    • http://sulorowanutabu.atwebpages.com/what_concealed_meaning_does_the_poem_fire_and_ice_depict.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/lg_washing_machine_smells_like_rotten_eggs.pdfIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_8794309c5d794482859b3e36024bd44e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1f2df6-d01a-4470-9364-3b6907cf8ca7/vunedogepezeviluvokati.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_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 5576 bytes
SHA-256: 5daad3c6b7ed5de7e5bb095d9baaec985729eebba1c583ce15355e246d5cc849
font_01_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 10280 bytes
SHA-256: c1479f18def8ec3d3cf9ade384931d6ffd6d300bf62fa93748f951ad13428e16