Malicious PDF — malware analysis report

Static analysis result for SHA-256 3421bec8878be529…

MALICIOUS

PDF

74.2 KB Created: 2021-01-17 13:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 430dc1b9c1f66ef36a46378a3d7f5310 SHA-1: 43471e9c04ef1b766af274d6377aa0eca7835e80 SHA-256: 3421bec8878be529afa8f8c989e572cc13cf4050f20e64b278b5975afee7555e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body references a 'Drudge report app removed from google play', likely a lure to direct users to one of the embedded malicious URLs.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/aws?utm_term=drudge+report+app+removed+from+google+play PDF link annotation
    • https://site-1200692.mozfiles.com/files/1200692/dedoxelofigukesibusub.pdfIn PDF document text
    • https://kofufavok.weebly.com/uploads/1/3/4/3/134313370/b25800e.pdfIn PDF document text
    • https://site-1175333.mozfiles.com/files/1175333/airtime_loadup_scanner_files.pdfIn PDF document text
    • https://site-1178139.mozfiles.com/files/1178139/definition_of_learning_by_different_psychologists.pdfIn PDF document text
    • https://site-1237907.mozfiles.com/files/1237907/olympic_archery_draw_weight.pdfIn PDF document text
    • https://site-1173807.mozfiles.com/files/1173807/islands_in_the_stream_original_version.pdfIn PDF document text
    • https://site-1168096.mozfiles.com/files/1168096/child_care_aware_mn_cda.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/degator.pdfIn PDF document text
    • https://site-1176453.mozfiles.com/files/1176453/pokemon_planet_guide_to_everything.pdfIn PDF document text
    • https://site-1177796.mozfiles.com/files/1177796/hematemesis_treatment_guidelines.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/jolunenafobuw/formation_chauffagiste_toulouse.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/top_10_productivity_apps_for_android_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/nomenclature_des_actes_de_biologie_mdicale.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/24859534740.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 5344 bytes
SHA-256: 73d6bb40159a0cce1341fd34742028791e91daaca034c34523a8f5f89ce956d3
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 11296 bytes
SHA-256: 80efee3e050bf3b98666c3080fd3131885af253d161ecde7fe3378c0d65b8b6d

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