Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0215f50e9995d47…

MALICIOUS

PDF

78.4 KB Created: 2021-03-05 10:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d70530b9cb75b94cbebc6f6c3e18cb4 SHA-1: 140cf94136f74b2b7afbc1f3130d2bd5eed25c58 SHA-256: e0215f50e9995d47f5e6e39e18ab3ed3ec02dde5ab9d1b486e41d76d45ef7812
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of numerous external URLs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/123?utm_term=how+to+adjust+cuckoo+clock+pendulum
    • https://cdn.sqhk.co/jolodovi/HqjiPia/black_female_short_haircuts_2019.pdf
    • http://zememor.sportsontheweb.net/88361787046.pdf
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/doganoxemexidim.pdf
    • https://bigikudas.weebly.com/uploads/1/3/0/7/130775628/fifavuniroro_xoboxola.pdf
    • https://cdn.sqhk.co/lekusovu/TLgijjP/99._5_the_wolf_cast.pdf
    • https://cdn.sqhk.co/bulelovuroga/hdIeJjj/25987861538.pdf
    • https://jitemino.weebly.com/uploads/1/3/0/9/130969659/e7daef11d8a.pdf
    • http://sevezor.scienceontheweb.net/sense_and_sensibility_book_short_summary.pdf
    • https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/nadoxib.pdf
    • https://cdn.sqhk.co/xupotuferu/mf352gg/37026070824.pdf
    • https://cdn.sqhk.co/timadupak/USjiUic/biketipenadozopizifi.pdf
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/wawujidudeketu.pdf
    • https://degitetebumike.weebly.com/uploads/1/3/1/8/131857056/1972886.pdf
    • https://juxokiwi.weebly.com/uploads/1/3/4/5/134594748/9769641.pdf
    • https://pozalifutasor.weebly.com/uploads/1/3/5/3/135325459/4736501.pdf
    • http://rosutob.getenjoyment.net/helter_skelter_song_youtube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_a75dfed3d2d2413d9e0e856cf76767f7.pdf?index=true
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_de78eff59c294003a2620e85328e5d57.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f30c0597-aedf-4bd6-83aa-b77a6343d8b3/viwadarufup.pdf
    • https://uploads.strikinglycdn.com/files/70d37f0a-0539-4709-afe7-3ebec6f9dcac/wixuribipobesinax.pdf
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_6ddecc6ee1434cce98fd83f356da3e5c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ac80e4f-e813-40fa-bc0f-214709083d87/lupozowapuleb.pdf
    • https://uploads.strikinglycdn.com/files/b7560302-a5d0-401c-98b4-80b1cdd27291/they_say_i_say_4th_edition_online.pdf
    • https://uploads.strikinglycdn.com/files/7cf0e68f-88eb-42d5-84b6-78cd0c51259a/fluticasone_davis.pdf
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_a0521cc0d6434882a8350691fbe1010b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f66d.bin
54a7cf17760f62aa75002dc0a66baeb5ffb2f0561ed6a746d94cdafd0fb16424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 5316 bytes
font_01_sfnt_off0001088e.bin
8c3f06e55eab74df81919f9301931a2335e10c6fdd5c4d6d61ac3ab7d592b69d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 10348 bytes

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