Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6090cf6de910f4e…

MALICIOUS

PDF

78.0 KB Created: 2021-05-09 16:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ea53060387eaf64f41918867c6103ae8 SHA-1: c0d2b22c6033b61fa225beb0679dd052d9dbd15a SHA-256: a6090cf6de910f4e2b118a3db19aea43777d9bbf7d51a4a554c4be36edc8f268
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily corrupted, contains text related to 'dealing with emotionally immature parents', suggesting a lure to disguise the malicious nature of the links.

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://xezojetit.ru/strik?utm_term=dealing+with+emotionally+immature+parents PDF link annotation
    • http://idealica-italiaoficial.site/luzevaxuvazozalomani4y0mq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_606ea80a1de0a.pdfIn PDF document text
    • http://jakor.pro/i_am_david_chapter_7vcgvs.pdfIn PDF document text
    • http://1xbet-football.fun/what_does_structure_mean_in_reading71hgr.pdfIn PDF document text
    • http://lazezubeb.22web.org/38322206991.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/1652839.pdfIn PDF document text
    • http://twitter-center.com/qu_es_la_diferencia_entre_promocin40vlc.pdfIn PDF document text
    • https://gizazegixewaner.weebly.com/uploads/1/3/4/5/134596748/tafatunenig.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/wukiwoxeradoje.pdfIn PDF document text
    • http://gufutaca1.xyz/adding_text_to_photo_android1aahl.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/how_to_automate_boring_stuff_with_python_download.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/xeledazujofojelado68wsc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_602e1d2345a3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitenozof.atwebpages.com/practically_speaking_1st_edition.pdfIn PDF document text
    • http://zilemugas.epizy.com/contoh_soal_akuntansi_perusahaan_jasa.pdfIn PDF document text
    • http://bupalim.atwebpages.com/download_javascript_book.pdfIn PDF document text
    • http://daximukofosape.epizy.com/96241110516.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_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 5428 bytes
SHA-256: 1668acc364e9b011b8696e3e771d455405ca6b47969a2118065f5bc9566e2564
font_01_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 10440 bytes
SHA-256: 3461fa820095a951305e3adee77c48a0d2d54bd1178f75ba193a14b99b8c726d

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