Malicious PDF — malware analysis report

Static analysis result for SHA-256 b468552d19c59c64…

MALICIOUS

PDF

79.1 KB Created: 2021-03-08 12:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 771ce9fc6544d87122f0f9637a0fbb6c SHA-1: 47ff8460fbd53b978300a0270ff0c461bcdee757 SHA-256: b468552d19c59c6443cd5d84ee36ce5297d1a8953fafa8575bf3f786b21ed3b7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/123?utm_term=formation+analyste+financier+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376849/normal_600fc3887dc51.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/3234545.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/drIidr0/tuwur.pdfIn PDF document text
    • https://zutiwemozebej.weebly.com/uploads/1/3/2/7/132712207/eeacb1289d.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/8Vwiggf/likuxojap.pdfIn PDF document text
    • http://verification-help.business/american_drag_racing_association5n0ts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484605/normal_5fd2cfa37c314.pdfIn PDF document text
    • http://4bochki.ru/7518806315bd2w7.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/iaEjh98/best_battleship_games_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_603ecf6068b69.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/6452ab6e063c.pdfIn PDF document text
    • http://ita-talia.fun/can_my_pc_run_football_manager_2020ya0ji.pdfIn PDF document text
    • https://gasaromub.weebly.com/uploads/1/3/0/7/130776100/4f366d0de.pdfIn PDF document text
    • https://kifakujokaw.weebly.com/uploads/1/3/4/7/134709271/e4462954041939.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/Ihb4haT/wofizonadixebonu.pdfIn PDF document text
    • http://uscarins.info/liu_cixin_the_three-body_problem_bookiy4op.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/fb3L4MJ/block_wars_survival_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5fc5b244dc55b.pdfIn PDF document text
    • http://zdsshop.top/fidobevubigvqsg8.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/wexoteluwag/cairo_metro_map_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/nixarogofexi.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_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 5360 bytes
SHA-256: 27c771eb8dacfd85543cb168850f1777d4e7169a42b22435603bf13187d0e083
font_01_sfnt_off00010a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A65 10812 bytes
SHA-256: e0dd52898483003485f8332596e5ed6c2b405629042c23a2202048fdcebed684