Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bfc618038f7268…

MALICIOUS

PDF

88.3 KB Created: 2021-04-28 15:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bcf7672c6ae9bb22a7c6af56fc9778bf SHA-1: e3d748f44a47e8db06876aa0aa8a83d89fa58f16 SHA-256: c2bfc618038f7268af5fb9ff8f6930cd6b0254a01011c0ad1d5b97bf23616f4c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including brand impersonation for credential phishing (Netflix) and general phishing detection. The embedded URLs and the document body, despite being heavily obfuscated, suggest a lure related to movie streaming, which is a common tactic for phishing. The file also acts as a link farm, directing users to various potentially malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kevavabine.weebly.com/uploads/1/3/1/4/131406582/1080394.pdf.
  • 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://golowaki.ru/strik?utm_term=call+me+by+your+name+full+movie+online+free+with+subtitles PDF link annotation
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/1080394.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/xam_idea_science_class_9_free9fm1o.pdfIn PDF document text
    • http://golden-charm.ru/534143528677iejz.pdfIn PDF document text
    • http://vittorguxx.site/ronudeliburefopiso5xltb.pdfIn PDF document text
    • https://wigeludob.weebly.com/uploads/1/3/1/6/131636858/kuwivifor.pdfIn PDF document text
    • http://eagleaff.com/pearson_algebra_2_workbook_answers2jhny.pdfIn PDF document text
    • http://shtancircul.site/97047469795cvk8w.pdfIn PDF document text
    • http://gloslides.com/kulefojefokofakim6tt8s.pdfIn PDF document text
    • http://ver-alex.website/krups_ice_cream_maker_partsbm5i1.pdfIn PDF document text
    • http://twirlini.com/72917904497glntl.pdfIn PDF document text
    • http://regvoolkim.website/bullying_in_secondary_schoolscdpju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/introduction_to_computational_linguistics_syllabus.pdfIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_a3db9af4acf24be3a58a122275069974.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/acpi_ven_hpq_dev_0004.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/papisutilimul.pdfIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_4bb864a29fd84dad922451f0c2e87f9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/divonedujopafixekela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4bcc85d-06fc-4c8b-8952-75b561e41301/66087919115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7dd11a-9287-47ec-9ad8-1aefaedc70e0/boy_scouts_lawsuit_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9315a70d-fc67-46fc-86e7-fee608235309/who_is_the_current_army_chief_of_staff_in_sierra_leone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f278f5b0-b3a1-431e-9d20-a8d85e51352b/67670576388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3a00b3-bd4a-4f45-9bd2-97cefb152387/romeo_and_juliet_leonardo_dicaprio_soundtrack.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_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 5308 bytes
SHA-256: bbb178d5ea9475a67eafb0a8bcae55b4ef062daac88c96d9ff8b3de4b55658bc
font_01_sfnt_off00012abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABE 12100 bytes
SHA-256: 3963e629eec538254bf365c0fe57b285dba22d1b3f40617debba7ca93d9fc25c