Malicious PDF — malware analysis report

Static analysis result for SHA-256 e141f43f70851931…

MALICIOUS

PDF

86.3 KB Created: 2020-11-17 15:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a9123fba8a599460a2c3e4309c063832 SHA-1: 2fece1622dae24fdc488e575141a55627d1ed330 SHA-256: e141f43f70851931e8e9dcb55bc238ec83e564790480f0bde73c60d985867099
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?utm_term=vomi+arc+en+ciel+definition In PDF document text
    • https://litabunor.weebly.com/uploads/1/3/4/5/134522775/fceecf9.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/5168799.pdfIn PDF document text
    • https://vorabatuzawudun.weebly.com/uploads/1/3/4/5/134582038/zufuvozulitegapo.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/pezeferoxesizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5faedb999079e.pdfIn PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/giguwuduwoluz-detumenajip-didazekavebulen.pdfIn PDF document text
    • https://nugizutotenit.weebly.com/uploads/1/3/4/5/134502776/6b36ca13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_5fae9f9bb0114.pdfIn PDF document text
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/guvuputudakupasak.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/tujeviwakirawu/1st_grade_reading_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/42572000334.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/kerebewila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8888cd-3387-4371-87c0-bf2d89852d2a/24765305512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b661f897-107a-4341-901a-0fe4399812d0/vizio_e_series_tv_manual.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_off000112b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B4 4952 bytes
SHA-256: af188576c4c22019bab8a55b9be04ab77c0d3e5ad139a3d0d503394138cfad0f
font_01_sfnt_off00012376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 12480 bytes
SHA-256: 5c4dc534e2a6c7f6599cdfb0ca6173a0f91a57d43681ce967412355a15ed24b2

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