Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8863fc7f784e8d4…

MALICIOUS

PDF

230.7 KB Created: 2021-04-14 17:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 339db7a5ab9d7ed024f97337cf497fbd SHA-1: 51236d802bb92de389e24e598666f409de64bdb4 SHA-256: f8863fc7f784e8d49f3e96afd3e07a3778b84454282ceea5792cd16ad31ba4ee
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain 'resalured.ru'. The ClamAV detection and ML classifier also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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://resalured.ru/strik?utm_term=situacion+politica+espa%25C3%25B1a+siglo+xix PDF link annotation
    • http://bobiruropiles.22web.org/99740400291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5fe9060449746.pdfIn PDF document text
    • http://mumadefiku.iblogger.org/top_5_cartoon_websites.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/093b1216.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/bhagam_bhag_movie_hd_720p.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/jatafel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_6033f9230d30a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fccf5c2ad01c.pdfIn PDF document text
    • http://wekawuro.22web.org/nous_informer_conjugaison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_604894674f4f5.pdfIn PDF document text
    • https://vekazapez.weebly.com/uploads/1/3/4/6/134601327/ralusukigug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fd796a229fc3.pdfIn PDF document text
    • https://gabodudir.weebly.com/uploads/1/3/4/7/134717456/rejiwuvekunad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_344b4b54f9a0438db1a43d467dff4253.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_75ea5673735c4eebb48def2785adf9fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22a65bd-57aa-4ce4-8d16-80155840a0f7/60858632138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fba6cce-10c6-42f0-90ed-8cb7d7d61581/does_the_swiffer_wet_jet_take_batteries.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_b7def092b71f4b2495391e48a89334eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebab7891-1094-49c9-bd0f-325e773b05ae/59866228599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cbf9434-c8e1-441c-8be2-56c14e00353f/sukepudoxesezuw.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_072872e864fc49fd94e81b3ce783e532.pdf?index=trueIn PDF document text
    • http://sifebina.epizy.com/24688621742.pdfIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_d4396cadf83e4d62bcc51b6929e87177.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d590577-23b6-4178-946c-dab7b6913045/45841168.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_bdfd21d2b2a14e5fba0823026d466b58.pdf?index=trueIn 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_off00034d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D80 5388 bytes
SHA-256: 04150efdf04351407545c81ac63a63c5e932e6588693e32edc3c73e2693bc4d3
font_01_sfnt_off00035fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FAE 13632 bytes
SHA-256: 93f5df524f5415ac440d900034a012ba6459b971b0f526baa6485a0eb7050661

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