Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5b5d9cbcba55ba…

MALICIOUS

PDF

88.4 KB Created: 2021-03-20 23:38:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dc7d2268c313574f67d2790f4552fa2e SHA-1: 28ab4ef2bfaee70fef4bc6143cffb548381b9915 SHA-256: 1d5b5d9cbcba55ba59bd8c802558c1eb07ad3fb5fa4ea549bd159e5c5da2696b
184 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains numerous embedded links. Several of these links point to known malicious redirector infrastructure or disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=the+veil+norfolk+parking In PDF document text
    • http://kernig.online/4526136905164ctm.pdfIn PDF document text
    • http://servempieza.site/honeywell_th6110d1021_thermostat7stp3.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/3539589105.pdfIn PDF document text
    • http://helpcreditscore.info/which_country_has_highest_per_capita_income_in_201984u8i.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/kusiwilimarumupi.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/2431897173.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/el_coronel_no_tiene_quien_le_escriba_resumen.pdfIn PDF document text
    • http://mailedflkf.site/4229280632521g51.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/wowikogesojapipajezazi.pdfIn PDF document text
    • http://buybritishcat.com/minuet_in_g_beethoven_violin_sheet_musicpp1mz.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/85295881848.pdfIn PDF document text
    • http://probkin34.xyz/xerizefivan6h5rm.pdfIn PDF document text
    • http://playmarket-online.com/what_to_avoid_on_the_dash_dietoo9up.pdfIn PDF document text
    • http://bigtittybella.com/have_you_ever_song_worksheetc1z48.pdfIn PDF document text
    • http://lumasilove.iblogger.org/49683205359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewamamewiler.atwebpages.com/lisogodop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef42fb5-8b8d-4109-b7e8-caf9c45de9d2/how_to_remove_ge_profile_microwave.pdfIn PDF document text
    • http://miwetiguv.epizy.com/59921515697.pdfIn PDF document text
    • http://pubometev.rf.gd/brand_collaboration_proposal_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6456dbe3-c98d-4a85-932b-a76e410c34c6/notekexotazite.pdfIn PDF document text
    • http://wafalox.rf.gd/domain_driven_design_quickly.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 5056 bytes
SHA-256: d44f7d36526d0f9804383d56816dc0f6e362deec9c6dd8a807477a0f73abd4d7
font_01_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 1968 bytes
SHA-256: 886c37836f5724f1430c3bc4b33a36bb18b7bce29473efee535fc21d8c745794
font_02_sfnt_off0001147d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147D 11956 bytes
SHA-256: dff7748d842a1646c55c9e536d251ad4faa312f01d876a56c2aa6c01057c58de
font_03_sfnt_off00013d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D64 16040 bytes
SHA-256: 8647281a3c744fc6d0b53cd0b4129fbf868dc80d788fe83738ada4fefb377b5a