Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17f6176818588df…

MALICIOUS

PDF

71.3 KB Created: 2021-01-23 12:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2c14c71d86e0e97fb5ea5c12d6f2855d SHA-1: 92241b8fb35c45e817c64685db688c878d073298 SHA-256: d17f6176818588df5668b36bfd64d69e86340949ae85ab2527d23096424b55a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'Smithsonian natural history extended hours', directing users to potentially malicious URLs. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=smithsonian+natural+history+extended+hours PDF link annotation
    • https://site-1245653.mozfiles.com/files/1245653/setijowitanufutudego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462986/normal_5fdf52e84ae83.pdfIn PDF document text
    • http://majidadap.22web.org/fbise_scholarship_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5fffc21b53589.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/iihbQvO/45720997073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5fe7ef59efb48.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/O0dgi89/pevega.pdfIn PDF document text
    • https://site-1180242.mozfiles.com/files/1180242/10597117107.pdfIn PDF document text
    • https://site-1176476.mozfiles.com/files/1176476/rig_veda_odia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5fe2449531a33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevepapowiwed.epizy.com/annotated_bibliography_apa_format_examples.pdfIn PDF document text
    • http://tabifewegijip.epizy.com/sadopusiliv.pdfIn PDF document text
    • http://bavidoripo.epizy.com/cbse_10th_class_board_exam_datesheet_2019.pdfIn PDF document text
    • http://javasuk.epizy.com/rfc_con_homoclave_formato_cedula.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 5336 bytes
SHA-256: e097c8957a255ee9a9012e676ab5a0bb4051009f83e3eda2eea608a62e8f73bd
font_01_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 11060 bytes
SHA-256: f1f7e03ecbc871f267dec76ec660f577e74cd799fb9abdc2d0653035d3a0cb42

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