Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ada512dde842de2…

MALICIOUS

PDF

98.2 KB Created: 2021-03-15 18:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 40943ba13100a696bb8ec35375d8f9cb SHA-1: dc36c8f942bbcac0ed91f607913e7d03bdd884bd SHA-256: 8ada512dde842de245e973cb2ccf1165cd656649b614d4e494a8bf54294be9e3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to salt intake, directing the user to a suspicious URL. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure strongly suggest a phishing attempt designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=how+do+you+feel+when+you+eat+too+much+salt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490265/normal_60145f4ca8204.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/atrial_septal_defect.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/natedipalorifew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5ffa17b31839f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451556/normal_60111f94bd2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_5fd98e806d1e2.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/canonical_correlation_analysis_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_60299f67eea0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_5fd34e2f41327.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/how_to_convert_a1c_to_average_blood_glucose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_601e533984e8f.pdfIn PDF document text
    • http://tonorubur.22web.org/86380383989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_603f21efdc51f.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/vipuxafol/zuwagilamadiwurafipobe.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/jawalukov.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/kinemaster_pro_chroma_key_app.pdfIn PDF document text
    • http://noxudabewoxedit.rf.gd/collage_maker_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/learn_stock_market_india_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/pakijovidabilerozetini.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/balu_telugu_movie_dialogues_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/81117389866.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_off000143b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B8 5320 bytes
SHA-256: 63825d0113a341095ca5287320e01ef354bcd3688cce8c0f555c2a9bcf4af845
font_01_sfnt_off000155c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C3 11068 bytes
SHA-256: 32d4ecae70b29aae43bf2392b46c0cfd3466156d1178e5dd63e01dabfcd5f2ad

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