Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4f5e3276feb972…

MALICIOUS

PDF

66.2 KB Created: 2021-02-26 07:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e232590f5f64a8f2f9c7291df021ceb1 SHA-1: 334bd060a361ff5e6c5c9cce5f18bd8235221866 SHA-256: 1a4f5e3276feb972a649c03a815aeacbad0d3db44019cc705a80779b9c22bf7f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URLs, with the primary one being `https://jottigo.ru/award?keyword=don+juan+mexican+restaurant+near+me`, disguised within content that appears to be search results. The PDF structure itself is also noted as a link farm on disposable hosting, further suggesting malicious intent.

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://jottigo.ru/award?keyword=don+juan+mexican+restaurant+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401525/normal_602e67dc24bcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485435/normal_5ffe1cdb52b01.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/jaxamiriraduraxejugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5fe35bb11d3a3.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/74750215183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_6033843fa599f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5fdb6840b232e.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/best_mackie_analog_mixer.pdfIn PDF document text
    • https://simidolipuxemit.weebly.com/uploads/1/3/4/4/134486986/pefametugaxax.pdfIn PDF document text
    • http://rafidoletusamox.22web.org/why_is_my_evod_blinking_10_times.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/sazomo/gunibezuravete.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/math_games_to_play_on_zoom.pdfIn PDF document text
    • http://fetewuzapozoza.rf.gd/54747498790.pdfIn PDF document text
    • http://sexuduwivaz.rf.gd/get_more_followers_on_instagram_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/mla_style_guide_citation.pdfIn PDF document text
    • http://gagafexekoxoseb.epizy.com/vewolajaranafanisejeni.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/karnataka_budget_2018_highlights.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_off0000c8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D4 5056 bytes
SHA-256: c4f865c050fd2b77febd6ce188e5a3b21f861e585269f4f2265e27849d7cd9d1
font_01_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 9852 bytes
SHA-256: ae99249fead851d85da13b37483045411c2ebdd7c92ad3e5dd18c56b1f949e6d

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