Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c8b29a05cbdd4c…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 20:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b05a32fb3b1f1458499965401d7435af SHA-1: 791dbf2c1025e05249326c9e4606f91996f7f490 SHA-256: 36c8b29a05cbdd4c2b0bb66c316db184f7c828138bc5f5860b7b2072050a0815
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though corrupted, suggests a lure related to a coffee maker manual, likely a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/123?utm_term=oxo+coffee+maker+barista+brain+manual
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/9a1a8347aaea412.pdf
    • http://prizinsta.info/sekimufidubotikapibaxol9aqra.pdf
    • http://allostar.buzz/debt_5000_years_reviewgnjb6.pdf
    • http://chambre.xyz/zajesipadapukotiparosakbjq7w.pdf
    • http://lovelid.xyz/tuvegugixawogojamiwavwbwx4.pdf
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/xubite.pdf
    • https://cdn-cms.f-static.net/uploads/4392872/normal_60168fbf15705.pdf
    • http://ubzvp.com/11224224108o8tvd.pdf
    • https://tedudizoz.weebly.com/uploads/1/3/2/6/132683188/filivum-bolezutivef-gowux.pdf
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5ff24e406281f.pdf
    • https://feziriwavejoli.weebly.com/uploads/1/3/4/0/134096108/jukavezorikeg-nubobofafafe-mexatalalege-divozowatuno.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5105fb9e-f6a9-45b2-8acb-cbe81149817d/2003_ford_focus_battery_cable_replacement.pdf
    • https://uploads.strikinglycdn.com/files/15560d45-52a0-4dc4-8335-7c2b327d5063/18975234789.pdf
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_1b9583a243bf4f0d9099f7abeb046d16.pdf?index=true
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_52dc420828264d13ac41c36de81646d7.pdf?index=true
    • http://votararinugofu.rf.gd/tratamiento_para_angina_estable.pdf
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_e9474d001cfd4d07a69f64eb7fe57e74.pdf?index=true
    • http://supipagaj.epizy.com/34322421122.pdf
    • https://uploads.strikinglycdn.com/files/ab8b86cf-301f-4918-8219-568d4e9becae/88112398976.pdf
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_6960af0f53be498c99ad88c69a15818a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3f799680-62da-4ba5-8fdb-eb1c1e33833b/what_happens_if_you_fail_amazon_drug_test.pdf
    • http://pulilidason.epizy.com/couple_cartoon_pictures.pdf
    • https://uploads.strikinglycdn.com/files/babf87ba-f0ea-40e8-99a9-5967532bc009/why_is_my_grill_not_heating_up.pdf
    • http://wexadelovatapox.rf.gd/40085365713.pdf
    • 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_off0000f7d5.bin
33e123b3fa25734c264481e95b3615a125c18c0dc4f6d09e853a4ea41e1e01a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 5328 bytes
font_01_sfnt_off000109e4.bin
7536b4d0f4c6c2fdccdc5bf88dc23c0819cb87cc8e51b531af692d8146e20a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 10524 bytes

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