Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1f052330fdcff1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-12 06:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 02eef669dc7b6476249e928f76213144 SHA-1: 57729ec852980252674fca74f618828f0c07f5dc SHA-256: 9a1f052330fdcff1a91fa15ef5dd85a343f8991c7b77a27e4912483366d63150
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure attempting to redirect users to malicious sites.

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/123?utm_term=canon+eos+1100d+pc+software PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376611/normal_5fefefbcdf61e.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/hbiiEhe/mirrors_lyrics_natalia_kills.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/metunuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_5fe8551e7bd0e.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/a6b01e5.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/dibebu.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/heart_of_darkness_quotes_explained_with_page_numbers.pdfIn PDF document text
    • https://gegiwozik.weebly.com/uploads/1/3/4/7/134719936/7b72a1.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/minn_kota_power_drive_v2_i_pilot_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_601e602ae882a.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/gazunefidubopalaraje.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/bJXyuXi/land_of_war_gameplay.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/puzamijisuwisexulumogosox.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/hq0uUh3/pocket_league_story_2_mod_apk_latest_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nazifaba.rf.gd/real_cb_hair_editing_app_for_android.pdfIn PDF document text
    • http://jixizawunireda.epizy.com/bixesemigujanusapel.pdfIn PDF document text
    • http://wesatume.atwebpages.com/warcraft_3_original_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 5164 bytes
SHA-256: 4ab4593d67ad62f60befd849ce8210d59d0d9b2dd581e3abc6995ab7b67944fd
font_01_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 10108 bytes
SHA-256: 68c9b62baa88717bf764a88780102158e1cf2c42b754b21b2877eebfc526b0ee
font_02_sfnt_off000110d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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