Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bba6edcd6cea80…

MALICIOUS

PDF

88.1 KB Created: 2021-02-25 01:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0917ee848c425e6da1411cf8fed968d1 SHA-1: e257fcef40e0eb5440966bd6e2b9e2a264e3e287 SHA-256: 95bba6edcd6cea8021488e02010352c3097678f030ff4354f84922148e56737a
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'jottigo.ru' and a 'Download Button' heuristic suggests a lure to a malicious site. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=speed+queen+commercial+dryer+heating+element+location PDF link annotation
    • http://ooovseanalizi.ru/863811294453eit2.pdfIn PDF document text
    • http://grantmedica.ru/capable_noun_form9u1t9.pdfIn PDF document text
    • http://gatorama.space/3005964194fh8ai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5ff2d7f70e8ad.pdfIn PDF document text
    • http://bitcoins-profits.com/zirodwnlq8.pdfIn PDF document text
    • http://lovelyhouse.online/61299880635tj66d.pdfIn PDF document text
    • http://natnat.fun/90730605395hmhvb.pdfIn PDF document text
    • http://istra-backwater.ru/8223753617141ax3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_5fe999a7e82ae.pdfIn PDF document text
    • http://paganel.world/sinekadamigugetfm62y.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/geraromu/horse_oil_mask_sheet_review.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/acceder_definicion_informatica.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/27477026801.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/figurative_language_definitions_and_examples_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/5777247195.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/avenel_performing_arts_center_nj.pdfIn PDF document text
    • http://xuvunemomot.epizy.com/49420121036.pdfIn PDF document text
    • http://vukilef.rf.gd/tales_of_vesperia_walkthrough.pdfIn PDF document text
    • http://vilobeve.rf.gd/meade_lx200_classic_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/durubukosoweful.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_off00011987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 5640 bytes
SHA-256: c81bf678da434ab2cb246453b1afd434cca6b09f03d5625bb1551d90e724d9f0
font_01_sfnt_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 11340 bytes
SHA-256: 5da52b93e7a702f64289b504aa142f8d2fe35e55e3c23506b351d24523e73f55

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