Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73a84cbc51aeae1…

MALICIOUS

PDF

71.9 KB Created: 2021-01-16 22:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f151f71bcce2f4f7bb164a5b3654614a SHA-1: bb552d38887fd1c1875a0cc195530a554573dd85 SHA-256: a73a84cbc51aeae1b2dd7ae129958a22e4270fb77695c041a0d0ed4eb8f13124
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body contains keywords related to 'john deere belt replacement' and an external URI pointing to 'trafffe.ru', suggesting a lure for malicious activity. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=l120+john+deere+belt+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447447/normal_5fd7d314cb910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f8c82ae86211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_5fa499c8d2f79.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/xevum.pdfIn PDF document text
    • https://demifezi.weebly.com/uploads/1/3/1/3/131379940/a7a63.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/bidide_nipadogefosov.pdfIn PDF document text
    • https://site-1171882.mozfiles.com/files/1171882/dusemevax.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/dizeku.pdfIn PDF document text
    • https://site-1188419.mozfiles.com/files/1188419/rocket_royale_pc_no_download.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/ruzaganog/2495164901.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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 5616 bytes
SHA-256: 9e116fdc8137063da9a6c8a43fb70e320b8d2658385f3246d5000c0f83e4c1ef
font_01_sfnt_off0000ee19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE19 10808 bytes
SHA-256: 13354793e54346876ee97bf2b6ec57bbc1415a15c19a776fe7035619d95fc6db

Open this report in the interactive analyzer, or submit your own file for analysis.