Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa295762a8eaffd4…

MALICIOUS

PDF

113.7 KB Created: 2021-02-21 23:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ada985517783242f16c2b294d0e56bff SHA-1: 18fe56b81e2fe51d50579bd22b359221f6460ee1 SHA-256: aa295762a8eaffd428d40696dfd6c1f6da1be4992cc4a43c19f78906f6f63552
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with a notable heuristic identifying it as a link farm on disposable hosting, suggesting a distribution or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/123?utm_term=are+humidifiers+without+filters+safe PDF link annotation
    • http://kipivejezijab.iblogger.org/iso_9001_certification_procedure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387233/normal_5feecd049781e.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/fjcie5i/rokosoraratozixotupu.pdfIn PDF document text
    • http://prod-fruit.space/mini_world_block_art_apk_dayn320y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_60150edcc2064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453741/normal_5ffbaf64d520c.pdfIn PDF document text
    • http://itravelgr.com/school_teacher_simulatorvrqv9.pdfIn PDF document text
    • http://milky-rp.space/vupimikuzajutfz1fw.pdfIn PDF document text
    • http://satanifefa.22web.org/vizio_sound_bar_remote_xrs321_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6010562ed2db4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowewewabozete.epizy.com/zidugeletojemekunu.pdfIn PDF document text
    • http://guxefezuguwi.epizy.com/matlab_draw_filled_circle_on_plot.pdfIn PDF document text
    • http://lefamuredemupi.epizy.com/6615378734.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/large_format_self_adhesive_vinyl_printing.pdfIn PDF document text
    • http://sadabodavezuzi.epizy.com/carl_jung_personality_types.pdfIn PDF document text
    • http://tumajazumi.rf.gd/31433729140.pdfIn PDF document text
    • http://guligakifiw.epizy.com/nefatovurasidol.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BD7 5228 bytes
SHA-256: 520ed1b635fe95d1c4673fce5ab363b296176e1f9f7b02a597eac0e758ad10b4
font_01_sfnt_off00018d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D88 13704 bytes
SHA-256: 5e9892a501a2abbb80eaec426f059ed3b59c914029b6c58592e41ce728520622

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