Malicious PDF — malware analysis report

Static analysis result for SHA-256 17da30c343a5ac31…

MALICIOUS

PDF

92.2 KB Created: 2021-03-17 22:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1b438649c7ac0de29c6fa5d4dac4d7c SHA-1: d32fb3e86f6280f793b5db995313b174105a3223 SHA-256: 17da30c343a5ac3147bc95320a2b1c0d7a4334380fd5ba501eca73665895e2e2
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a suspicious domain, and ClamAV detected the file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://botokaw.ru/strik?utm_term=the+element+encyclopedia+of+5000+spells+reviews
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/junawetubakub.pdf
    • http://deliwubavamir.mypressonline.com/lotus_carlton_weight.pdf
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/69e01460cde.pdf
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcb657f701da.pdf
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/pufilajovupilab.pdf
    • https://cdn-cms.f-static.net/uploads/4374847/normal_603015a8c8bc6.pdf
    • http://mevakimuvu.mypressonline.com/ferrari_california_for_sale_dallas.pdf
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fe6ae54b2190.pdf
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/jeval.pdf
    • https://static.s123-cdn-static.com/uploads/4381964/normal_6008eb559111b.pdf
    • https://cdn-cms.f-static.net/uploads/4481552/normal_603a6d38a539e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_efdc53aa55134c2b8bbe4f36c935a4d3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0408cf91-b07d-4b75-918f-1d400fffc5c7/instant_pot_duo_sv_6qt_multi-use_pressure_cooker_recipes.pdf
    • https://uploads.strikinglycdn.com/files/64a970f1-7373-4692-9ff4-8f538ebac159/30062878877.pdf
    • https://uploads.strikinglycdn.com/files/e3c881aa-9bf4-47bf-9317-306d49d050ad/que_es_la_foto_tumblr.pdf
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_58c6aea3ddf8421fbc9f9ef3778328b8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/26ec30de-8d5e-496a-8d93-de63b9f1fc92/21562328643.pdf
    • https://uploads.strikinglycdn.com/files/f567b84b-bf8d-4ef8-a9de-a2fc60ccd76e/why_is_the_red_light_flashing_on_my_insignia_tv.pdf
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_d80e0367352c468784340f05a289ede7.pdf?index=true
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_8906a580ad044db2b9e8f85849f6eba9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/10b76d54-146d-47a2-850d-e08652eeac0b/juegos_de_hombre_araa_en_moto.pdf
    • https://uploads.strikinglycdn.com/files/e1d962ee-3b14-4233-bc7d-adf7d40e3f1e/unity_download_assets.pdf
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_9d41b181eab44cd693b7e47fee957983.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c01ec293-a443-4a28-a8fe-15f70596f3a6/sony_rx10_iv_vs_rx100_vii.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014635.bin
cebaca869291e8f7ed90fdaa9be1ee15f1102c54e7c2efa89663db83c9f82159		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14635 17768 bytes
font_00_sfnt_off00010c5c.bin
74c98cd9559f55e790afe8e32a82e9cbe174d97478cc54c8b25a259a2dfd1424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5C 5864 bytes
font_01_sfnt_off0001204c.bin
643f7d08f18d60d292e975634e09711828a064ce38a7efde5063b86e53e160d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 11020 bytes

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