Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbe224fb05aeef7…

MALICIOUS

PDF

38.3 KB Created: 2020-10-06 14:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5637ec729b1e803154d9c040487c4db5 SHA-1: 8d38f7de62dbe8c1c7e63fa395eabf9aff28b464 SHA-256: 5cbe224fb05aeef7d551fde4dd2d1a972fc1bdde2dbbb48ef9fc335e8d46c9ce
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/pify?keyword=declaration+of+independence+grievances+worksheet In PDF document text
    • http://xugume.kimgrace.net/uploads/1/3/1/4/131407469/877218.pdfIn PDF document text
    • http://dubuden.brosforstevenash.com/uploads/1/3/2/3/132303245/gisusivune_suvosowozinis.pdfIn PDF document text
    • http://xevilej.serrerskin.com/uploads/1/3/0/9/130969130/05392f5cd02a.pdfIn PDF document text
    • http://bewekifax.meridiande.com/uploads/1/3/0/9/130969950/jetitav_rebiwokuke_vetojexipi.pdfIn PDF document text
    • http://xonasu.harmonyhypnosiscenter.com/uploads/1/3/2/6/132683209/xeziwupoxerinolimiz.pdfIn PDF document text
    • http://bezuneb.everythingnaturalpools.com/uploads/1/3/0/9/130969868/gilabeteta_punadomonoku_zekufode_kajanos.pdfIn PDF document text
    • http://tenusoko.misspankhurstslearningspace.com/uploads/1/3/0/7/130776891/f1d2f4.pdfIn PDF document text
    • http://files.aquaclearpx.com/uploads/1/3/1/1/131164476/titafifis.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/868ef831-38ee-4bb1-901c-b0a329e5bc20/15745592416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5101dd-d0f7-4df0-b518-672b1fa2869f/12245717083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab963abd-d7bc-425a-a479-ff015aab60de/6776752132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718932e9-02eb-4d65-ad87-0c31e1c3d721/13118590323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b72aa80-088a-4fa4-b513-00aa2c178f3e/29016431926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0191/3759/files/100_percent_games_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/19688917653.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_off000054eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54EB 5632 bytes
SHA-256: d94effbf731f9ce44a6f71675552fa84a27236261d02c548735c11a2634db6ad
font_01_sfnt_off00006835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6835 10428 bytes
SHA-256: a790f7f55f34d88831e85c18b0adcf3aed630b17291aa37bb165b1f5b222890b

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