Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba3759b6f17573b…

MALICIOUS

PDF

72.3 KB Created: 2020-11-17 00:35:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89df2cd4dd64334db9351be2062da1e9 SHA-1: d02d0e1d680b799195801d8e7381260eb81df98d SHA-256: 5ba3759b6f17573bc584df065d2d111e65a97d95bf16880e3e16f848a28acdb7
244 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or phishing attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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/123?utm_term=big+book+pages+86+88
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f923b4f20c14.pdf
    • https://xomarexisu.weebly.com/uploads/1/3/4/7/134701616/karovogixixoju-mifogabe-xilowoxegewa-gilobetozumom.pdf
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/kozet-muniperaki-tonawavevofoko.pdf
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/venomuvom.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/gubugasilukapolagok.pdf
    • https://dosedoduni.weebly.com/uploads/1/3/4/3/134347632/9186572.pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/dikumasi.pdf
    • https://winomexixuz.weebly.com/uploads/1/3/4/6/134621408/a3b07dae884.pdf
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/7165589.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wifozuxeku/how_many_protons_electrons_neutrons_in_carbon.pdf
    • https://s3.amazonaws.com/tadevewuju/42356368809.pdf
    • https://uploads.strikinglycdn.com/files/4249cdb8-22a2-4bd8-9b4b-b0c0ce34d588/computer_concepts_in_action_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/1e15e787-6655-45e2-b503-dd55e7bde9bb/doxenete.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df71.bin
889705de57fe318205d8f91c7ca6d4da910feb3b337638838ef2b8b78a33303d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF71 5460 bytes
font_01_sfnt_off0000f219.bin
7092aba2eb699c442c72c70d7e61a0c5345beaa725a220117fd410d354185ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 10100 bytes

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