Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e791a118fbbff59…

MALICIOUS

PDF

78.1 KB Created: 2021-01-03 13:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7ee7845493496e061bba32eab55027c2 SHA-1: 7de44b57dc84120d9a926eaeb789ccb2e42a2435 SHA-256: 5e791a118fbbff5955f5e039561eba430055d4b387960d47d3e10d2ab2bf2ea3
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is malicious, specifically flagged as a phishing trojan by ClamAV. The document body, though heavily obfuscated, suggests a lure related to interview questions. The primary malicious indicator is the external URI pointing to a suspicious domain, likely intended to host a secondary payload or phishing page.

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=healthcare+behavioral+interview+questions+and+answers+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5fca9f341b90b.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/ggfPLib/dino_hunter_deadly_shores_mod_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/jigizgj/whip_crack_app_big_bang_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/ebgfjf6/72336153332.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/5Zhgk8v/99565900055.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/gowebabuxogiro/instagram_story_questions_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e794f0cf-ef8c-4511-b921-085b0faa1b96/kudatituvesi.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/14845189783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b41180-821d-4a65-82ca-2d3abc4ca7ee/weather_forecast_for_the_week_of_thanksgiving.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/ice_rajkot_bin_sachivalay_model_paper_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3258e3-754a-4799-a8dc-9aed2d56f6b7/28921907175.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/7504275853.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_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 5620 bytes
SHA-256: aafd601e95aa12514577f11df801610b45d487c7c6b366f7f8d4d699b9a37f6c
font_01_sfnt_off000107bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BC 10376 bytes
SHA-256: 64e2e3190c4c2c5e7d6681ae92c0130cd9cab206252719ebdf3f9ff0333a21f0

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