Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd36aa1b5e4f3fe8…

MALICIOUS

PDF

92.0 KB Created: 2021-01-06 13:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 502e9e027b89c10fe1282079bbed19fd SHA-1: d7a86c1573232f0fabdbd43d64c7bb838551004d SHA-256: cd36aa1b5e4f3fe899baa9196d6ff3c0d5692da45296384edaa6191a23202b71
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to a UFC fighter's record, likely intended to trick users into clicking malicious links. The presence of numerous external URIs and link farm indicators points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=dillon+danis+record+in+ufc PDF link annotation
    • https://cdn.sqhk.co/getabemuto/3cdwJKB/ps4_emulator_apk_data.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/nixagawuwuneku_norokupizanir_zuxumunogilarab_wogubuvuz.pdfIn PDF document text
    • https://fepanaxowa.weebly.com/uploads/1/3/4/3/134311119/golegali_sabuka_munexu_xetosewaxex.pdfIn PDF document text
    • https://nijolajosota.weebly.com/uploads/1/3/4/6/134678148/nazototan_metun_ronivev.pdfIn PDF document text
    • https://defifipak.weebly.com/uploads/1/3/4/4/134442047/nekugulunorixu_murotavadofa_nopawukabemom_dofedabe.pdfIn PDF document text
    • https://duzozutilitu.weebly.com/uploads/1/3/0/9/130968921/7413095.pdfIn PDF document text
    • https://kapuwibipu.weebly.com/uploads/1/3/0/9/130969563/jamemoturopo_kabiwibi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457272/normal_5febb1552f373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378378/normal_5feb9a87893dd.pdfIn PDF document text
    • https://dosukasexu.weebly.com/uploads/1/3/1/6/131637789/kaxafivasujokitan.pdfIn PDF document text
    • 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/77f85d25-89e2-4c95-a792-d92ecfd4c5c4/96610662914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38531b9-315f-4f5f-affb-50685eea7cc7/mini_friteuse_canadian_tire.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/giramolanosa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012af0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12AF0 24340 bytes
SHA-256: 5339a4ccd6fda963b1615f80b91e48b4c81a98502b56fde574e9ad34f77282e0
font_00_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 4816 bytes
SHA-256: 70c7b9523603ee0c5d21358222ab3a3dc2fbf9b6b2bb257452e5d6eedcd5d64c
font_01_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 11208 bytes
SHA-256: dfc23be6f9f43b0fcda15dd7eb0025a098eadc37bafa0cd7d09f63e3acc567d4
font_03_sfnt_off00015488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15488 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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