Malicious PDF — malware analysis report

Static analysis result for SHA-256 966c8ff02966cc6e…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 08:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5ea9cf674cc8d0847ecbd041f8b690ca SHA-1: c2f2eef9e8a6ee308dfbdebb9d7c171b647e76d2 SHA-256: 966c8ff02966cc6ed273607d47f566f09d9294e27916ab508b22e0eaf452b3e4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution scheme. The presence of a disguised download link further supports this, aiming to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/wix?keyword=delta+17+multichoice+manual PDF link annotation
    • http://dostafood.xyz/44432207079r3s41.pdfIn PDF document text
    • http://italiahot.fun/pokemon_nuzlocke_rom_hackx17w8.pdfIn PDF document text
    • http://senaxemuj.iblogger.org/tedatupukulawo.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/gfAhhgi/latigo_de_sheldon_apk.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/4576966.pdfIn PDF document text
    • http://rexapeduke.66ghz.com/1983152328.pdfIn PDF document text
    • http://fruit-citrus.space/filmora_7.8.9_effects_pack_free_downloadq24a6.pdfIn PDF document text
    • https://cdn.sqhk.co/polirorenu/ZXsggjh/14652449132.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/2d4726d940ee20.pdfIn PDF document text
    • http://mikurukapuviwib.22web.org/xivawikamixoxujirosufid.pdfIn PDF document text
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/0388bb24c7c6.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/fLhfhbH/47098555439.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/HgfigI1/super_pro_drag_cars_for_sale.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/c5dc2920-bac5-45e7-b0be-63f0cbbaedba/7-4_similarity_in_right_triangles_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/what_color_is_your_parachute_2020_vs_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/animal_personality_quiz.pdfIn PDF document text
    • http://tojopoxirer.rf.gd/jesogikesusadegoluvig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc4909f-5689-4073-92c4-a119b7b1b8c6/78800525425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb33870-5aeb-48c7-a664-de22d7faf281/43764692114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348409b1-6d16-40ac-a65d-b58324ac2587/borafalazoma.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_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 4896 bytes
SHA-256: 9218c330e788cfcd6bf57e407628c01ee471df9f472adca037888d810b4d1d7f
font_01_sfnt_off0000fa4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4C 11820 bytes
SHA-256: fce8b4a95b5af9ec1cbb1208a6e0f7dd94af55e45ad484f808368e4eb337c61a

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