Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f09db2e5484baa…

MALICIOUS

PDF

66.5 KB Created: 2020-11-14 06:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e00da7641b628a2f8dd50957e878388d SHA-1: 260557367d161d8524378197eba4ba477756122a SHA-256: 33f09db2e5484baa5fad64787de812afa0e9badfdc78ec740e826c4895150a4e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=cte+madison+wi+school+district In PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/8843d8.pdfIn PDF document text
    • https://jedujidiki.weebly.com/uploads/1/3/4/3/134352610/rarokugukaz.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/lijufi.pdfIn PDF document text
    • https://kukezuleji.weebly.com/uploads/1/3/4/3/134361302/c31d2dfb5d3570e.pdfIn PDF document text
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/1793280.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.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/407decbb-73a4-43a0-9732-dcebb4a58270/mikojajibakidovoku.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/73181334694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1597750c-487f-4360-9cf6-1302973e3aab/que_son_los_homnimos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbc4421-ab48-4254-8b7f-e67d53cfb6b7/woodhaven_high_school_graduation_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4058a4-610b-4f88-86ac-7e3039647340/tagevinekabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edcd70d5-ac97-486b-baab-391556bc5218/pamono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a91c9e-16b2-4337-bbd3-50d3d725d3d4/87617648518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca420bd-f0d2-4cb7-a575-761994e2fa62/metepojazidavimufesone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b418241-5744-4809-ab4d-d56501feda4f/a_very_big_branch_worksheet_answer.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_off0000c77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77C 5176 bytes
SHA-256: 4c97aa01bfc1853df42bf07cc05a9631a4b26df08cea23b38aea2f0ad017bb58
font_01_sfnt_off0000d8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F7 10712 bytes
SHA-256: d348aaee39124fece9e6cf3c1ed9352af1f1cd4cf2bde0e0a933f0359939bc1c

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