Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c98ca62d8592c3…

MALICIOUS

PDF

68.2 KB Created: 2020-12-16 17:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7600eb2f8d8a678a3c64f8800bc9af76 SHA-1: 99cdf9ee28496001d4fd2cb4f7003492e515a742 SHA-256: 01c98ca62d8592c3e4fd76172f115e2965188e31969fa9e477d2e351ceb59491
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of numerous links suggests an attempt to manipulate search engine results or phish users by directing them to potentially harmful websites.

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://ggtraff.ru/123?utm_term=saturated+and+unsaturated+solutions+worksheet+model+2+answers In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/dosapisobi.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/a4495863bd9dc7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fcf990fd44fd.pdfIn PDF document text
    • https://zijananuwale.weebly.com/uploads/1/3/4/4/134438714/wexana_ferirorufegunow_sonog.pdfIn PDF document text
    • https://dakovogusuzulex.weebly.com/uploads/1/3/4/5/134595229/4036884.pdfIn PDF document text
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/1da52deb.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/sezebepit/bhagavatam_in_telugu_audio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/matekofuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1366588c99b6d37a92994/t/5fc5ae9fbc819f1cf49d0da9/1606790820083/compare_and_contrast_essay_assignment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06308fe5-ee34-4885-bc8d-bacdd28addd8/pisces_man_scorpio_woman_fight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bc88df-9165-42de-9770-8b355d993462/manual_biblico_nelson.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/sozomututa.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/edit_pages_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599dc1e9-9a77-4fba-8267-f1db9909d002/painter_poet_bob_coleman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63de043-c887-49a3-94a4-914723c66f26/57700977387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5733358-6a2d-4142-98d5-caca09996a01/movies_baker_city_oregon.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_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 5456 bytes
SHA-256: c3be6f9ccd13006d6bdeeb9533ad37ff8b5706b2448a7ce9c8cb6c7763afebd6
font_01_sfnt_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 9788 bytes
SHA-256: 2b65af47aa6df931bb62fb7b2078edc08bd1d4923f60aa09bb1e45c6d323bee5

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