Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f085c11a73e899…

MALICIOUS

PDF

76.4 KB Created: 2021-05-17 04:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 57beec0234724f9e7cdfd246aec196f9 SHA-1: 6487b5f08b9bc09bab8dadc80537d665eed4644c SHA-256: a6f085c11a73e8990d3fe6846100a5b32febd2014933700f9bd42a688d2e88bc
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous external URIs, many hosted on disposable domains and utilizing UTM parameters, strongly suggests a link farm designed to redirect users to malicious sites. The 'SE_DOWNLOAD_BUTTON' heuristic indicates a lure to trick users into clicking, likely to initiate a download or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=relion+battery+reviews PDF link annotation
    • http://fresh-ita.space/72139262009si2vh.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/55978648583.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/wivibexamuxejub.pdfIn PDF document text
    • http://nekretnine.site/38884600412abmjw.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/iiehflt/rasopag.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/19637199526.pdfIn PDF document text
    • http://sun-italy.space/144270159790a6hh.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/magatonujepegu-bukowegupif.pdfIn PDF document text
    • https://molozotupinomel.weebly.com/uploads/1/3/4/3/134340336/8186084.pdfIn PDF document text
    • http://copyrightmediahelp.com/faux_calligraphy_alphabet_worksheetsi58kb.pdfIn PDF document text
    • http://medway24.com/vicks_germ_free_cool_mist_humidifier_v3900_manual3umgs.pdfIn PDF document text
    • http://tomandbxof.site/gotalamaloglsfq.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/anchoring_script_in_english_for_school_morning_assembly.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/gG7dgga/township_playrix_forum_deutsch.pdfIn PDF document text
    • http://uscreditinquiry.info/bafx_obd2_review70e5i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipipigi.atwebpages.com/femur_fracture_management.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/campbell_hausfeld_vt6195_-_3.7hp_60_gallon_air_compressor.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/damuxavitezolinorusi.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/bcbs_of_michigan_member_appeal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/what_is_the_icd_10_code_for_uti_with_sepsis.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_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 5080 bytes
SHA-256: 71f528ba32bf62d2f463087fd2e091c22f83c4f50c97108be46c622440d782af
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 11324 bytes
SHA-256: 48acf393034fe05d48418e4560400e9ff0a005e4e8529552c9a57a89e79206b5

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