Malicious PDF — malware analysis report

Static analysis result for SHA-256 9911ca32168db852…

MALICIOUS

PDF

81.9 KB Created: 2021-02-20 19:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 854582a826e206612bc68c543f858831 SHA-1: 1350808993bb8d620b3b29e5db9704f05e9e1c18 SHA-256: 9911ca32168db852d2ad2dd807828114b948fccb4b250324da27e40c2d83216d
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'network security books'. No scripts were extracted, but the presence of external URIs and the malware detection indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=network+security+books+for+beginners+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487647/normal_601464cabb655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_5fd1a93b805f8.pdfIn PDF document text
    • http://changepass.online/12215492835ben8s.pdfIn PDF document text
    • http://faceit.su/what_type_of_transmission_fluid_for_2003_ford_rangerzcy28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406191/normal_5ff6994936264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488101/normal_601b53d123a13.pdfIn PDF document text
    • http://acupofjacob.com/shrek_2001_english_voice_over_wikiars71u.pdfIn PDF document text
    • http://epaytds.xyz/barbie_cartoon_movies_in_tamil_free9qh83.pdfIn PDF document text
    • http://menegatuje.iblogger.org/california_driving_test_2019_answers.pdfIn PDF document text
    • http://tradebot.space/lupuwumutifubeparv1xnz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_601814fe63a11.pdfIn PDF document text
    • http://epaytds.xyz/subscribe_icon_png_freevz9b3.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/palevijuj/estafilococo_haemolyticus.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/wifofudulevobuwikinanis.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/dibotavowamumekizotipezo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/wudomuzeruvuwedobebakub.pdfIn PDF document text
    • http://silapopo.epizy.com/xebikaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/non_chronological_report_features_game.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_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 5448 bytes
SHA-256: d6a64263f9c40583b690bcf08849d1a318ba2ff2d47521be7b198ff7ed70738e
font_01_sfnt_off000114d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D7 11096 bytes
SHA-256: a81634c20ec907f258e099166b42abb489cfdc39cc3e40b434c8e8651e59c592

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