Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3517896b4213f5…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 02:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2625fc86993b715c98b865f65c5e0128 SHA-1: 545f9b4c22af2aae31caa087e16734ef87f1f1b4 SHA-256: 2d3517896b4213f5eac5fd5613f9f99e4bba67e1951bce51c2d767babae64f43
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through social engineering, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pelibifir.ru/strik?utm_term=operations+research+journal+list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5ff48bf718069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5ff6cf4dea3d2.pdfIn PDF document text
    • http://mamontov-net.cc/7986829713thbj.pdfIn PDF document text
    • http://webcam-model.online/48729818631xv1ld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_603eab6701363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_6049216639b92.pdfIn PDF document text
    • http://digitalmedialit.com/xojebaguregewitudumelout8t9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402032/normal_5fe2399d69abc.pdfIn PDF document text
    • http://hookup153.site/87938444454n18uc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494877/normal_5ff8c1a948483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_603c76a86568a.pdfIn PDF document text
    • http://naturaitalia.space/20248590302jcgjr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473618/normal_5ffbd942b797f.pdfIn PDF document text
    • http://copyrighytsupport.com/automated_software_testing_with_pythonmhe7q.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/6165866079.pdfIn PDF document text
    • http://theharaka.online/foziwulosamixurhjmtp.pdfIn PDF document text
    • http://cosmicgig.com/80424901336f8ue7.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/singer_stitch_sew_quick_handheld_sewing_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471099/normal_60559d3b752db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/mavusibozam.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/47891605993.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/krause_standard_catalog_of_world_coins_free_download.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/ctet_paper_1_syllabus_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/87451644346.pdfIn PDF document text
    • http://pawuzax.onlinewebshop.net/verb_adverb_adjective.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/home_inspection_report_definition.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_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 5124 bytes
SHA-256: af6189c607d71ccc95497040d7b389623af8eae28f71e0ecef359f677b1aaab3
font_01_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 11104 bytes
SHA-256: 9d8952717f90f3091ee289bf73bd72372ed16caf3a6db970513dac1e9f83d373

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