Malicious PDF — malware analysis report

Static analysis result for SHA-256 9045b0dd484901ca…

MALICIOUS

PDF

86.8 KB Created: 2021-06-07 03:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c3f84c825917956c390d38fbe919045 SHA-1: 208082b439f3905aef09480b104eaab9813a3ed7 SHA-256: 9045b0dd484901cafdd148b8e0227a835079502e460a6fb2cbf0cb4774c956d2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to link farms and disposable hosting, indicating a strong intent to redirect users to potentially malicious sites. The presence of numerous links and the 'utm_term_redirector' heuristic suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://huntic.ru/pbw?utm_term=oraciones+subordinadas+adjetivas+explicativas PDF link annotation
    • https://wilivaja.weebly.com/uploads/1/3/2/6/132682565/9319410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_6051238e710a5.pdfIn PDF document text
    • https://nepazumikad.weebly.com/uploads/1/3/5/9/135958915/faeedf1da2902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487665/normal_5fcb37e593b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_60bc919facdc1.pdfIn PDF document text
    • https://zuligenewem.weebly.com/uploads/1/3/4/7/134749141/6930330.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
    • http://lagawiwefe.pbworks.com/f/41840374657.pdfIn PDF document text
    • http://jumedew.pbworks.com/f/wakujowaxenutizid.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/f/delonghi_coffee_machine_descaler_manual.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/what_are_the_characteristics_of_traditional_economy.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144634947/compuestos_inorganicos_ejemplos.pdfIn PDF document text
    • http://garewewaziwu.pbworks.com/f/30361714183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f0f189-45df-4bda-ac69-8f3906ffcad2/jofip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20aca877-f67c-4454-a7ad-43fd2178682e/kelexolejesoraki.pdfIn PDF document text
    • http://nagaxop.pbworks.com/f/tukuxijugiwaxuvowofusu.pdfIn PDF document text
    • http://sonubugu.pbworks.com/w/file/fetch/144674349/nojuvofepe.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144629280/xafodilizovago.pdfIn PDF document text
    • http://nutafojijoki.pbworks.com/w/file/fetch/144752370/curso_rapido_sobre_la_magia_del_caos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 5320 bytes
SHA-256: 36ae1a14cd8e18e9c00faf1d771f0aff5dac94d9ffd1efa7da6a820f14b27786
font_01_sfnt_off00011780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 11996 bytes
SHA-256: b625317e56ec3f55f5b68b8a8fb2e198a0a7a66406d728465ac47911fa12a354
font_02_sfnt_off00013e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E27 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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