Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa28fe952411090…

MALICIOUS

PDF

74.4 KB Created: 2021-03-30 22:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d18f1e2089981275aea6abcd9b95dbe SHA-1: bf0a59ff63f2ad0d2d216b3e99a879126d92fbd2 SHA-256: cfa28fe952411090818fe201e6ed82bb40b5e0489854d1c7d84e2d31d4115bab
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains embedded URIs, with one pointing to 'https://golowaki.ru/123?utm_term=example+of+psychological+report+format', likely serving as a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=example+of+psychological+report+format
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://vnds-v.website/key_upstream_61v1vx.pdf
    • http://wekeb.space/steinway_model_s_baby_grand_piano_for_salesgkmy.pdf
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5fd0a1c8dbff0.pdf
    • http://formblckr1.xyz/youtube_how_to_thread_a_vintage_singer_sewing_machine3z4ag.pdf
    • http://polikarmonolit.ru/sotojutajaljxb9u.pdf
    • http://espaceabonnes.com/dorewixelitoesf.pdf
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fe530d69f99c.pdf
    • http://goldotzyv.ru/alto_shaam_1000-up_parts_manual6vvc9.pdf
    • http://shop-you.xyz/what_reading_level_is_diary_of_a_wimpy_kid_wrecking_ball73wnw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eb5be823-3d56-48b4-ab82-346be701f768/royal_crosscut_shredder_1200x_reviews.pdf
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_23fe17cdda9d4170a2ad5ac85e5ec20d.pdf?index=true
    • https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_1ac1ff6d670c40a5a637535a5e108d58.pdf?index=true
    • https://uploads.strikinglycdn.com/files/77cd574a-69bb-472e-a549-8fad7308822e/4343422262.pdf
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_c19c67233e144d3fa159600b2e831cae.pdf?index=true
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_792807437e3a4c43b6ca75a49c3bacef.pdf?index=true
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_afe7fa1ce3b347dd9152eae43b7bb1d8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ced09202-fdfe-4aec-b4df-01dda8a3168f/bernina_artista_180_price.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f8.bin
3c33171703740b4d223355ec8e75d0be05431b0d2693d31669fe0068c76f5032
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 5556 bytes
font_01_sfnt_off0000f7c5.bin
a5f002e7ccaca186437de6c04854db76372e4a7b1abbab7b8f9384c18845bb2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C5 10068 bytes