Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2219bc35b6484b4…

MALICIOUS

PDF

71.3 KB Created: 2021-01-06 07:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fa087f0b4375c6be85c43922e9a65f4d SHA-1: 9196ceabb3a71c8a2c510792dcce4b7063591e25 SHA-256: f2219bc35b6484b410045bb2d83f396f607cbf246f240213d9df01ac627f9b55
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, contains text that appears to be a lure related to job-related questions, suggesting a phishing attempt.

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://traffine.ru/aws?utm_term=competency+based+questions+decision+making+answers PDF link annotation
    • https://loxuvamozevu.weebly.com/uploads/1/3/4/3/134310095/fcfb8c710aa45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5fa474e010239.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/9902509.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/ginutu/20463938389.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/aerie_swim_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/manager_managed_llc_operating_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5876ab-dd1b-4679-8067-732966121e68/16213010615.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/video_camera_recording_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf33c00-5c3a-418a-91b4-1722c0a60862/32523656117.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/human_atlas_anatomy_2020_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/black_eyed_peas_album_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/palipufinupadona.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_off0000d977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 5792 bytes
SHA-256: ecfc5297ac0d5187b0f78604e464f97422a1c8966196362f16ca7feb0668cac7
font_01_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 10268 bytes
SHA-256: ed88c197f2711b538c80052a82fafb045c9b00e562ed2c35f6718f7826de27b9

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