Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa49b035ea2dae28…

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 05:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3bf965e6a89c1ec18f01a59e6c98558f SHA-1: f7ee811bbe4ffbd4adbf7fb148b69f3b944697a3 SHA-256: aa49b035ea2dae282cf78a398edd5970aa82f5107ed027d10eedc20720fe3dec
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The embedded URLs suggest an attempt to redirect users to phishing or malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=arya+samaj+vedic+bhajan PDF link annotation
    • http://rubeatyshop.xyz/are_kohler_generators_good6mxrr.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/rogarikugitqvsf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494440/normal_5fe56a70ebf11.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/97183343457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5fc5cb86031b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_604b9f37a1c55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453891/normal_5fcd3806cc8f4.pdfIn PDF document text
    • http://sacredname.ru/binomial_expressions_in_englishc1kgo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_5fdb8aa2db21c.pdfIn PDF document text
    • http://beliyden.xyz/gobubutijafegi7b143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_600b112b2c8c8.pdfIn PDF document text
    • http://tekelas.iblogger.org/graphics_card_driver_windows_10.pdfIn PDF document text
    • https://sowobufujugazid.weebly.com/uploads/1/3/0/8/130873997/5779158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486772/normal_5fc9ccbc1de3f.pdfIn PDF document text
    • http://bizamiba.22web.org/boxotezefasigokepin.pdfIn PDF document text
    • http://axecheat7.xyz/youtube_herbie_hancock_maiden_voyage_full_albuml681y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_603334506c141.pdfIn PDF document text
    • http://wivewadejitipe.iblogger.org/joy_luck_club_book_summary.pdfIn PDF document text
    • https://dubebonu.weebly.com/uploads/1/3/0/8/130874554/58d77bda460a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://jexiduro.rf.gd/bfx_full_form.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/magic_chef_mcsdry1s_2.6_cubic-ft_compact_dryer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 5512 bytes
SHA-256: 756a1e840e4c65dbe196a5e9c81d4748227dd8df6d810afc22c4c75285a04697
font_01_sfnt_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 10432 bytes
SHA-256: 63c9c8428200901ee93a4fde68d788cbd9c2a125a222c999737778aa5c407222
font_02_sfnt_off00011a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A63 3372 bytes
SHA-256: d6a9f69db4bced6c60e47df12bee18171e29821eec67f63a6454939e5dc49757

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