Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba50c32769f71157…

MALICIOUS

PDF

67.4 KB Created: 2020-11-13 06:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9b2460ba1735b5a5956bb7f0594a49d8 SHA-1: 2c997d7c28e350dc597fe18bd0010cf4a4cf0f0c SHA-256: ba50c32769f711578718eb3ee34da0d57b987ba80637227c387300ab30fad294
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafficel.ru/aws?utm_term=bimanual+palpation+of+parotid+gland', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it's designed to redirect the user to a potentially harmful site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=bimanual+palpation+of+parotid+gland PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f9448488d89f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_5fa2b5e10d420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5f9e578517c8b.pdfIn PDF document text
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/baropegadafowofinanu.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/405102.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/tabelafegulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5fa43a59e7277.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/tedowafomaru/bukejovuwipexupija.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/game_cafe_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/88795080191.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/difference_between_rhyme_and_rhymes.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_off0000ce3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3A 5232 bytes
SHA-256: 87ea5701fedd91c6420614e821a407754f13c31cd9ecbb4ba385df62f372ba3f
font_01_sfnt_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 9664 bytes
SHA-256: 076b80976beb783928addd25e356a2a6be241efec7a99e3fe6ff5732e72b8fd3