Malicious PDF — malware analysis report

Static analysis result for SHA-256 9935687340d2b4ee…

MALICIOUS

PDF

79.4 KB Created: 2020-12-22 03:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3a942549ef64bf1e41fd3168c7bb5a08 SHA-1: ce2a5b3ab2deba6b8f0d547edc344400efbd1675 SHA-256: 9935687340d2b4eef60584264a9a6b160cb1b34d80ebb200a00fd8781b6676d1
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 URL that directs users to a suspicious domain, likely for credential harvesting or further malware delivery. The document body, though heavily obfuscated, appears to be a lure related to an interview.

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://trafftec.ru/123?utm_term=palmetto+girl+state+interview PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f89732a1a613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8740961bea7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a159f4d-93fe-4c69-ada0-20b9852f57ca/eco_column_lab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60979e15-ed1a-424c-bbc7-0c299e3b01d8/ka_stroud_engineering_mathematics_7th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5444e8787e8798988a94a/t/5fd60e38164d0f203c7198b9/1607863881404/zoviwawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff9867a-788d-4407-b358-56b49d9f4952/rugatezezurur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ff6d74-bb49-4591-b70c-ede531071783/division_2_eagle_bearer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8977b72b-c7a8-45f7-9bbc-885f95708015/13055366044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e77198d-ab41-4834-80ab-8ff28ee880eb/sotijiw.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/takeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e83ef74-dba3-45e2-8161-7ac40086565f/la_virgen_de_los_sicarios_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/49428070981.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_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 5160 bytes
SHA-256: 45052b37435abba2491f1372e6ae04487d5397046f51881a767c9e017e794a84
font_01_sfnt_off00010d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 10528 bytes
SHA-256: 623c824e2c85ee6773d407ecf6b4e054978aa87415efe716e69c51576d5ac2e8