Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8a97dc633ae08b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-23 11:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 27e0e72bf0f4d69ab4102c0eada2e4ad SHA-1: 278ee2e7ea2f7728ef42f8b77a880755171b1d25 SHA-256: 6f8a97dc633ae08bd4173e068521f7072b0b566a2543ee167fbfda8961d6d38a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a suspicious domain, likely serving as a lure for the user. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=jumping+spider+enclosure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407060/normal_604e635a75bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5ff09166e70e3.pdfIn PDF document text
    • http://rikaxepe.iblogger.org/57289361775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_604e74b439a36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383791/normal_5ffb4b1dbba6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/zawuwululisusewagu.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/pisimolizekaxarorivul.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/mivozimope.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/maroon_formal_dress_long.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/windows_10_updates_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/26689107345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe0853f-aba7-43eb-a438-c60764f790f6/wajanegese.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/fodixupuluvazidofokipud.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/htc_file_manager_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/7800391193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31853fc8-c6d8-4887-838c-e29f621cd0c3/30150690833.pdfIn PDF document text
    • http://gasukexopesifu.epizy.com/zuzadusemaxoda.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/94590508700.pdfIn PDF document text
    • http://tinipukax.epizy.com/48057842277.pdfIn PDF document text
    • http://karuserewojax.epizy.com/rowupibudukenexetalixil.pdfIn PDF document text
    • http://setekavapitefe.rf.gd/liebherr_concrete_batching_plant.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/rosebava.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_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 5172 bytes
SHA-256: 85d35572481cf9c0bed85fd0e031806ed986eaffb0fcea796d87a7ea3e287cb6
font_01_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 11088 bytes
SHA-256: 0cb666e0fded200bdfbf2819d259fcb65c559174f62ce0c28b370ebd717ce638

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