Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ba04774aab3844…

MALICIOUS

PDF

68.5 KB Created: 2021-01-01 20:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b0428e2647daaaa2dc3062156c6bef32 SHA-1: 9d28254985cdd5a849da3e1c988dcd5f8436c1e6 SHA-256: f0ba04774aab38449e680d7e758db0a8c8424b2fff42736665ab849944c803c4
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used for phishing or to host a secondary payload. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=if+an+unprofitable+segment+is+eliminated PDF link annotation
    • https://cdn.sqhk.co/wajuvimavofo/ihM0PMT/5606183932.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/iXggnid/niboliviwisutamalesulog.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/aJgfbNf/does_among_us_play_on_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_5fab91720ae32.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/jukoxisojow/lilotovodafotop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71fd63d-861b-4589-86b1-9db1bd052348/whole_30_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99d8b0f-8d3d-44b8-b974-6df3cb0108b5/fewofabozaburawoxalidivit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/642b9799-af67-4faf-a782-cdb585d304b1/bagojenowegelod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892b0f87-8155-41f0-b747-215344203e3b/navuja.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/apus_launcher_apps_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06e2234-49a3-4ee7-8fd5-e54d50e7eb75/judesajexalumefobuzal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473711df-de97-46fe-84a4-63bc36666651/teoria_de_las_expectativas.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_off0000cf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF01 5440 bytes
SHA-256: 3e424adc01eea5f389f55136d0adb9fd5140f0385ee23021c02f7ce510d632dc
font_01_sfnt_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 9948 bytes
SHA-256: 559d2e0b6d0591df42a0badefb5c23f9ec0e448fd8c25852e045a29c72fac073