Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff532e60e36a9f5…

MALICIOUS

PDF

79.6 KB Created: 2021-04-05 18:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2ee785962b855d67fa13138ddaf4c3d3 SHA-1: 2f1da140ade0422e999597d256b2fad2d3257ee4 SHA-256: fff532e60e36a9f5edaf69eb5a971455bd1429be4388afd8df0913551d8aa92d
226 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic suggests a business-email-compromise pattern, aiming to trick users into fraudulent financial transactions. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • 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://xajibur.ru/strik?utm_term=how+to+check+covid+report+online PDF link annotation
    • https://cdn.sqhk.co/pikikunifav/pgcvges/android_9_redmi_note_5_xda.pdfIn PDF document text
    • https://fusagepewaliwe.weebly.com/uploads/1/3/5/3/135325652/565f751e.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/gfQiehh/babylon_5_tv_series_free.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/fggMDhc/get_your_guide_supplier_contact_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofifevag/egfgihd/abacus_alarm_system_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/fo9tYhf/motorcycles_for_sale_by_owner_memphis_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/ejijgcP/differential_calculus_word_problems_with_solutions.pdfIn PDF document text
    • https://lakogobeza.weebly.com/uploads/1/3/4/0/134096968/4324430.pdfIn PDF document text
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/duwevoxezinipe.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UAGrAQi/asos_design_chunky_cat_eye_sunglasses.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/gGWhggi/92359537219.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/jagejgX/66559761870.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/ehj5thb/aircraft_wargame_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_6d9546599107418f89340bd4a8ff9db4.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_bd884266736640f596b7607edd12d915.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_fa38b5432e334f2b80ccae8d3ef37f0c.pdf?index=trueIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_ca82984e618d491c8c95dbfc76aa70b2.pdf?index=trueIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_fc942343f41044dc90799b0b587c34a1.pdf?index=trueIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_93b1a44784d94c52bbb618ab321377a1.pdf?index=trueIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_90c0a90d110d4d6db4e6dd781688495a.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_62fa8053aa184f2aa4aa71621a17a229.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_9d4a795b48d04c198d9e5d76d9ad2834.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_901d456e03a347e59397fadb53044161.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_e89de6c16c234a23a1ad83a52e5f0a82.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_1af839c903044f1c868a2af1065d19d9.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_69177f6209464433a3fbed8713184eef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACA 4948 bytes
SHA-256: 6046c14ebb74b3a1e6ddab791ad242112c082818328f3016d4d8478ac8e38810
font_01_sfnt_off00010bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10868 bytes
SHA-256: 6c9a4d46f79c4e92f7cd93bd586154cdbfd6588b8ca2505336526571ef099d58