Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d43770a715c3c0…

MALICIOUS

PDF

69.3 KB Created: 2021-03-22 00:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 966686fa1e9b75fa210dee35f4515610 SHA-1: 9ee278ad8dfeddd95e0091deeb5bd611e572173c SHA-256: b8d43770a715c3c07b28d8bd9bef76532c6e5d02b50c711bb9b69c2fbadec311
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 and an ML classifier. It contains an embedded URI pointing to a suspicious URL, https://xajibur.ru/wix?keyword=equate+fiber+powder+walmart, which is likely part of a phishing or credential harvesting scheme. No scripts were extracted, but the presence of external links and the malware classification strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://xajibur.ru/wix?keyword=equate+fiber+powder+walmart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fc732ad77058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_60296960b836e.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/brownells_big_book_catalog.pdfIn PDF document text
    • http://kpovli.ru/8902165647513v54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_604076501a47a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_6035764613e68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_6010f242a995c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_60011013101a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368486/normal_5fcedc56bfdac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_600ed5876d3cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5fe2623e34e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_6022eb1555e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_603a244d01a13.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/68821567940.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501484/normal_6003fd32d10c3.pdfIn PDF document text
    • http://lovelyhouse.online/76416864652d41v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_60548c3dd11c6.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/d0806afc-9269-4c34-8fb9-34cf97c1d682/14023288997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc8d5df-5703-4ac2-8bc7-fb250ed6a1e6/learn_tarot_card_reading_in_hindi.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_off0000d0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 5324 bytes
SHA-256: aa673e21c168ce493317e5d96de9825c7e55fee619780e6415ede38745363a4a
font_01_sfnt_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 10864 bytes
SHA-256: 15b37c9f976409a9670c60d02796f12de94b6954334bbe2ae241c22493fba819

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