Malicious PDF — malware analysis report

Static analysis result for SHA-256 171896bf5fa208f1…

MALICIOUS

PDF

84.5 KB Created: 2021-02-24 21:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7401c8f87c47520e85b1d4f6489b08ab SHA-1: 5c0eaef254bfbfcce75c78ccfd2f13a0c79e83b2 SHA-256: 171896bf5fa208f174e96c9a0e7d4ab78b701f89201d6907e4c7a766b69554b2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious or SEO-spam-related domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://bologen.ru/wix?keyword=caracteristicas+del+imperialismo+en+el+siglo+xxi
    • http://potenciy.xyz/378236370710jxrc.pdf
    • http://fasekafalig.scienceontheweb.net/51860883326.pdf
    • https://tapuwapefozex.weebly.com/uploads/1/3/4/3/134350869/rikawikejefaburowu.pdf
    • http://lg-copyrightforms.com/wolinadusamevosul0ihgg.pdf
    • https://fofomakizu.weebly.com/uploads/1/3/0/7/130775640/zukadogokoj.pdf
    • https://kasorewo.weebly.com/uploads/1/3/2/7/132740312/715d04.pdf
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/4528647.pdf
    • https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/cf0a2da.pdf
    • http://registrat.space/how_to_program_a_chamberlain_garage_door_opener_953estd4o8y3.pdf
    • http://fazejajogavu.medianewsonline.com/how_long_will_an_ecg_take.pdf
    • https://sesumevikenaful.weebly.com/uploads/1/3/5/3/135346106/ziramuwenan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://litorow.myartsonline.com/simple_russian_grammar.pdf
    • https://s3.amazonaws.com/wobuzisibal/orion_sandbox_enhanced_guide.pdf
    • https://s3.amazonaws.com/venunamazozuzo/kafofurawipidovokaxafowe.pdf
    • https://s3.amazonaws.com/davubewu/48892806362.pdf
    • http://kavibajegis.onlinewebshop.net/cuisinart_cpc_600_series_manual_espaol.pdf
    • https://s3.amazonaws.com/serogajugomiji/binary_multiplication_examples.pdf
    • http://livirava.atwebpages.com/sutojowevepibubolino.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_off000109da.bin
17f787b2b7585fcfc6e1c0bd911334caefbe3b540fe60595eda7160d0075eafa
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 5364 bytes
font_01_sfnt_off00011c03.bin
ace1e28ce2e214da04020a1a6f8ae80beafe3eee4d08c66923413bb1952f00f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C03 12216 bytes