Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e4503e80684baf…

MALICIOUS

PDF

80.4 KB Created: 2021-05-16 19:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cc3df6dc1dea06e401b6549422d3ffd2 SHA-1: 54906285c09e2a111dbbc2d42f984b386f953248 SHA-256: f3e4503e80684baf6f135175b6f4544af5b9c95421e91fc28bd67eace6e2fd1e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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=simplicity+lawn+tractor+front+tire PDF link annotation
    • http://salimom.mygamesonline.org/lorosakud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_605196daeb03f.pdfIn PDF document text
    • http://babysampler.com/troy_bilt_2700_2.3_pressure_washer_partszh7ut.pdfIn PDF document text
    • http://silvanozito.online/surface_area_formulas_for_three_dimensional_shapesf5rz6.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/88926116616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_6058eb34ba707.pdfIn PDF document text
    • http://kamini33.ru/woocommerce_checkout_hook_guide5lv9t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482399/normal_60047f734830a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_60488292b0226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_5fd105e0cc262.pdfIn PDF document text
    • http://filanion.online/750085831507ho0l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_8323a59727b7422581a1ffec506ca4a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/17651387712.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/dapofi.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/zigob.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/43804969398.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/rufasivebaxegavadaxamole.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/sejowewufiwurizonof.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/84295470036.pdfIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_afd40841d9e44e2a9bf8beaa5c7f45bf.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_f21361b3d16b48018b96ac762cac238a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/kopokaweruwukaka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 5068 bytes
SHA-256: 2362b6df223ee417ad6e90261447632d3e840e44c9e1cd4717211dd30084a90c
font_01_sfnt_off0001014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 10868 bytes
SHA-256: 5b4d921d0b9f6a1f42547a3e4b283f3b2bc86facb38092d45d489349ffc62091
font_02_sfnt_off00012641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12641 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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