Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0112987ea7bb4f…

MALICIOUS

PDF

77.0 KB Created: 2021-05-21 12:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6404b2d97e115fec188ae54c45c0f1e SHA-1: 8d7d7894ae1931e9066770a86f7655fefb92e9fd SHA-256: be0112987ea7bb4f7401756bb559d379ab2a2b6887ebc9ec1b671a7e1e73b7e0
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=how+to+replace+a+honeywell+air+filter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366949/normal_606431435db0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_602d3c492ac88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_6058021597c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_604ca7ba65e8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5ff0d3ae72cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_602d246d82c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462037/normal_5fe8e5a8c7f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_6010823e5ed50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_603bc180842c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476123/normal_5fe26af7b8af7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fd903073695a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417523/normal_604130ac4bb96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_600dbdb431149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449193/normal_600930ae1c518.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/pujaxiliko-joferotuxabe-febuxomos-vivizad.pdfIn PDF document text
    • https://rujapunilibufig.weebly.com/uploads/1/3/4/7/134713438/1f20ca0165c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_60376062dbdcb.pdfIn PDF document text
    • https://xotonibesil.weebly.com/uploads/1/3/1/4/131407892/jegizenimudarekojer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_605f4e9d566c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_605328bcbfd6b.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/3495240.pdfIn PDF document text
    • https://nizakibete.weebly.com/uploads/1/3/4/3/134386075/wozuvoxaxiwewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 5080 bytes
SHA-256: c44e4b895f0dea4d88eac34578cabed770aa5f8f4ce507b9f8bd566e31fbd691
font_01_sfnt_off0000ff0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0F 11220 bytes
SHA-256: 9e41cf8903092b54f126c5af838b26b73231c9dc9cf551a34dac400ae7146f26

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