Malicious PDF — malware analysis report

Static analysis result for SHA-256 f397e01dbbe6617e…

MALICIOUS

PDF

80.3 KB Created: 2021-05-27 10:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33dee91eed39e12348d36fb2839c002e SHA-1: 893c2960a1a5edecf44ae4bb9086c35d3606aef7 SHA-256: f397e01dbbe6617eed817da2500234f8108fbabb16d4c1382d93415476646b18
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It exhibits characteristics of credential phishing by impersonating the 'Chase' brand and directing users to a redirector URL. Additionally, the presence of a large number of external links suggests SEO manipulation or a link farm, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://namuxewanazojo.weebly.com/uploads/1/3/4/2/134266474/zoposanufa.pdf.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/strik?utm_term=how+to+find+my+td+bank+routing+number+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455681/normal_604c971e0c1ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5ff16c11657bd.pdfIn PDF document text
    • https://namuxewanazojo.weebly.com/uploads/1/3/4/2/134266474/zoposanufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_6055800c1420b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5fe9ee16d055b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_603447ba4f17e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_600ebc6dbfdb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_600e4ba4a565e.pdfIn PDF document text
    • https://jemikarabon.weebly.com/uploads/1/3/0/8/130815017/sonavuxotimexisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_6069db3b9af94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_60531346adfbb.pdfIn PDF document text
    • https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/9352435.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/d8f20400-d525-4acb-99d6-15153be96112/pride_and_prejudice_full_movie_online_with_english_subtitles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19e1b4c-5304-4edc-b74f-49b4f0186bcd/watch_dog_the_bounty_hunter_season_1_episode_1_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae8cc23-a248-481c-afb4-a42b8d3f7a7f/how_to_solve_a_3x3_j_perm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec55c0f-62c8-4775-a2e8-2051bdfeaa07/68388550637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02117af4-fcf9-48c5-870a-5ae773d68c6a/56255510063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1d8fb9-34fa-414d-866a-80904d13fcfe/wuvevosimamutapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40994f9-69be-40d0-ad6c-f03deaeafd28/the_book_of_martha_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fc8b3a-13f2-4566-8a07-8f7c4a3babe3/8129205945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d285cc0-8562-4c92-9557-80f50f997a4b/cisco_ccna_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15210052-512b-48c2-a447-9bc378d92dc9/character_map_uwp_for_mac.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_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 5408 bytes
SHA-256: 6e8821c60cc1979d5dcb9b54354742f3d66ebae52305d134c837a59e3a80c8da
font_01_sfnt_off00010c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C23 11052 bytes
SHA-256: c10227d9afe79ef337555ac56354538c7f8656dc7fad8fd5543ecba1dca3cef3