Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce761c4faf2d52d7…

MALICIOUS

PDF

98.2 KB Created: 2021-03-03 15:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ed52117c83b4487d3751c9fe2fe18b71 SHA-1: f842252fd870d5ca21d9bfd15be2c2ccd00b3193 SHA-256: ce761c4faf2d52d75f50f02ecbb4cb76aae2def061eb23109147ac9ccc444839
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to the meaning of 'Auld Lang Syne'. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/award?keyword=what+does+the+auld+lang+syne+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371272/normal_6039d51920e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_60288480218a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475000/normal_5ff3dc7f43e94.pdfIn PDF document text
    • http://vulifux.66ghz.com/conic_sections_test_review_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd7b3b341e9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fc9ea3f8e93a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://bubanav.epizy.com/dapowopemefapax.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/39115604847.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/steam_speed_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/82767144747.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/bayesian_neural_network.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/esc_guidelines_2017_dual_antiplatelet_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/atom_linux_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/jitigejopisat.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/vitisanabigedenutolim.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/r_d_tax_credit_report_example.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/echo_pb-250ln_gas_leaf_blower.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/template_for_glinda_the_good_witch_crown.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/republic_wireless_anywhere_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/juwububodasiwajas.pdfIn PDF document text
    • http://vizomokirasu.epizy.com/white_tiger_film_rotten_tomatoes.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BF 3664 bytes
SHA-256: fb9fafe076fd491a1363fbe03d04ae890253349b5f6532040f9caa7a17650952
font_01_sfnt_off00012ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDD 5260 bytes
SHA-256: eeae88f86c2a3af5379ae4afb3261f4f9cc7b11df9b45b125d7daba7dee605f5
font_02_sfnt_off00013f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9F 7032 bytes
SHA-256: d9196a43bc9edccef4bdccd5aa844f7ad6eb9a6b399b27830468e06794edef1b
font_03_sfnt_off000152b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B5 11908 bytes
SHA-256: 44c5206b3ccee9ebd693e6c07bf009b4d781ddc6ea1830f0eb8b97628b8b8a91

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