Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bc89b5379d8bbf…

MALICIOUS

PDF

80.3 KB Created: 2020-12-21 13:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7d3ba2ee8659dce8999786cb54a42950 SHA-1: 949a553302ee04ea528b16fd7d2c1a131383cf91 SHA-256: 38bc89b5379d8bbf6821453d75cd459209498e558b59ef323068132a16ca8dd5
96 Risk Score

Malware Insights

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

The 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, traffking.ru, which is likely used to host a phishing page or download further malware. The document body, though truncated and obfuscated, suggests a lure related to political definitions to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=swing+state+definition+in+politics PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3bd97603-327d-43c4-a771-5d971ebf777a/86177454524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7820ed9-af3e-437d-b735-f558305fc081/89145789620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46b0d20-9a0a-4f41-98c3-fb93b0b0d038/ap_chemistry_balancing_redox_reactions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/john_wick_google_drive_link.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/wisolunefubajuxubewon.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/www.lowes.com_survey_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/avery_template_8160_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/rbi_grade_b_2019_notification.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/instructional_fair_inc_answer_key_if8765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b396c3d-89a5-4695-b2f6-c49423ac46ac/69369723377.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 5208 bytes
SHA-256: 54e1a82069a75427e9e4f613334211039141f5a6c5413bccd2e7a612795b6283
font_01_sfnt_off00010061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 11136 bytes
SHA-256: aef5176fe6f295116d6f38535bf3c70989c8d78103cbe8f08766fadb73145aed
font_02_sfnt_off0001263a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f