Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c75caef289a684…

MALICIOUS

PDF

95.3 KB Created: 2021-03-15 04:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: aa08b64f7cb46f4501547e541cd1d58d SHA-1: 6ea394c15f3dc54bdfc12197173c0bd30583c988 SHA-256: d7c75caef289a684bfa1e37cf6709cc9918b01bf87e63dfc6d790a9b68240c6b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://vilenefex.ru/wix?keyword=discovering+french+3+textbook+answers PDF link annotation
    • http://idealica-uficiale.website/88872888787xuexw.pdfIn PDF document text
    • http://feyakast.online/38591321092teiu4.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/handmaids_tale_watch_online_free_season_1_episode_1.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/bowepekaliza.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/xabapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501961/normal_5ffa1e0e1a868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_601e6c30cb6f9.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/76815985263.pdfIn PDF document text
    • https://vepidatebodosa.weebly.com/uploads/1/3/0/8/130874400/428d23e85f41.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/analise_de_dados_epidemiologicos.pdfIn PDF document text
    • http://shtampshop.ru/yamaha_ef1000_generator_for_salez69zs.pdfIn PDF document text
    • https://tofejigijo.weebly.com/uploads/1/3/4/3/134312142/1911e6a2cb4.pdfIn PDF document text
    • http://zowomojagobipur.iblogger.org/nevitaji.pdfIn PDF document text
    • http://usecabinets.xyz/char_broil_performance_475_partsaruwe.pdfIn PDF document text
    • http://vasowenotaruso.22web.org/gigabyte_z370_aorus_gaming_7_bios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_602043b210867.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/luzajovuxuvuxoteg.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/5291980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_601dd77250923.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/c8c59753-9d91-417d-9887-1ec15b3cd528/97471229035.pdfIn PDF document text
    • http://pivefev.rf.gd/73025675487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c638db-8cc1-4639-af02-6ba4db3bfdee/smart_body_scales_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9030196-7532-4aff-9a46-cf86f4b0b5b6/how_much_horsepower_does_a_jeep_cherokee_srt8_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7f22b6-2f59-47c5-8a74-bc2c5b20fd5f/relational_database_management_system_free_download.pdfIn PDF document text
    • http://zoxukawozo.rf.gd/35078180235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eef837a-2cb5-4cc2-8751-e807ffc2e0b7/wellness_wheel_questions.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_off00013142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13142 5696 bytes
SHA-256: 28ba8eba7459755633d29d7ab0e76a1981ac7b337683b6697d3f277464e35b1d
font_01_sfnt_off000144c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C2 13608 bytes
SHA-256: e485bf99fbb99b548437f251b80b05d1f91d757eda4364d744e60faaadc51b55