Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c1d2a9f4a2c123…

MALICIOUS

PDF

71.9 KB Created: 2021-03-03 23:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a192fef0adec156ebd3fb8c65489c143 SHA-1: 9931d92a0de533b3b71fd0d515722bbf75bed67c SHA-256: 25c1d2a9f4a2c12371168cd41a1e1fc3b7d8c6c29f3ee5b20b1467d3425ec022
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/award?keyword=what+is+a+good+hesi+exit+exam+score PDF link annotation
    • https://cdn.sqhk.co/sidamebo/hh5hgv3/khan_academy_4th_grade_math_measurement.pdfIn PDF document text
    • https://notowupoguja.weebly.com/uploads/1/3/5/3/135316513/naretozozob-durivikujufo-wosiwik-gatukonegujop.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/cvcchcL/toca_kitchen_2_online_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_6035164355530.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/65IDuhi/nabotuwexopodufegavo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476123/normal_5feb07d1bf125.pdfIn PDF document text
    • http://daddytestit.xyz/steam_link_as_chromecastxioru.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/UVurjcP/ford_sync_mobile_apps.pdfIn PDF document text
    • https://xibuzapesajeg.weebly.com/uploads/1/3/4/2/134236274/gegixavodufotufi.pdfIn PDF document text
    • https://wajevubal.weebly.com/uploads/1/3/4/6/134687537/9456278.pdfIn PDF document text
    • https://xamubamujizej.weebly.com/uploads/1/3/1/4/131483378/wojas.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/bihggOH/street_food_cooking_chef_pizza_burger_restaurant_georgia.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/favevebuxu-pasov-buviw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisumude.rf.gd/14969280957.pdfIn PDF document text
    • http://rigirulame.epizy.com/88159493677.pdfIn PDF document text
    • http://sijomowekiri.epizy.com/kenadazub.pdfIn PDF document text
    • http://pegafiloxor.epizy.com/sample_short_biography_template.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_off0000dbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 5400 bytes
SHA-256: d115ad49b433add837adf28ce841b3a15490b3d4957dcef11aded26b69b6d591
font_01_sfnt_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 10828 bytes
SHA-256: 6b6c29c6cd8b80bb272aea20f6deff5899c1aae76cb082791b6d470736397353

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