Malicious PDF — malware analysis report

Static analysis result for SHA-256 c102db3d8246ef32…

MALICIOUS

PDF

74.0 KB Created: 2021-05-27 23:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7f93562882f7a5e5473733f4d309f9bd SHA-1: 93c823c149463cf54f04a325af447530d645453d SHA-256: c102db3d8246ef32fb71d1a5bc3c3f1818fa5d9185d8ea0b6503c6532442dae2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=bijli+khadi+song PDF link annotation
    • https://fexemefamerera.weebly.com/uploads/1/3/4/2/134236105/5a5f95764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_6010636ed8330.pdfIn PDF document text
    • https://xixirebuwujesi.weebly.com/uploads/1/3/5/9/135989839/c4c668.pdfIn PDF document text
    • https://juboxunogaruf.weebly.com/uploads/1/3/4/7/134700559/zavune.pdfIn PDF document text
    • https://kogojovuxerew.weebly.com/uploads/1/3/4/8/134882843/vobug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460954/normal_5fd1532209e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fd651ea34260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_60377ce85b033.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/a9aec2c5-9b7e-472c-9cd1-2a765e2fabb0/summertime_saga_full_guide_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2749c893-cb22-435d-b646-8630c90ddae9/97593805645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b60bd7-9db2-4393-8389-d42646f5bb5a/73874162455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b58d0b5-2f23-4e1e-b19f-0b10610e07bc/how_to_air_fry_in_convection_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cf8078-8710-46fa-9ee4-9e33d8155f7a/kexugemabuzed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d3f621-944b-49ac-806b-7d9e40d6f25f/37063602079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b019b13-25b2-4cd7-9bf2-8d1434018732/manual_boost_controller_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b4c3de-bc8a-4386-b8fb-6c2430736e2a/58195101022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96742905-6422-4376-bce1-10d9ff8d083d/nitomovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc074501-c4c8-4a53-bd1b-0f1670ca6103/4336826207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed2d3da-63a3-4e44-b04b-78fe603a0a10/werazujimobewepukozab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d08154-2551-4891-901d-b304d9855f03/what_will_the_future_be_like_in_2050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e09cfc1d-d9da-4c30-be85-0c6d1becea57/32744568174.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_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 5180 bytes
SHA-256: b3acd2320d0ce039566f2e94cdb3f13d559bc00311055fee2b48030ca0da6923
font_01_sfnt_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 11448 bytes
SHA-256: 81a8ac033e3c3d127a3ed0663c68b4309feebe26ec1db3e98fd49b420f412a5c

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