Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccad9ff6f1226cfc…

MALICIOUS

PDF

103.5 KB Created: 2021-03-04 23:35:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 982eba018f4a455adfc2202b12d1f13b SHA-1: 33cf0d3293e8195d5b36ddde97e5cd2cf11c4552 SHA-256: ccad9ff6f1226cfc47b5946d923686f54684ef4429303f6dc038e85556f79651
126 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. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to data collection techniques, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://golowaki.ru/strik?utm_term=tecnicas+de+recoleccion+de+datos+para+una+investigacion+cualitativa PDF link annotation
    • http://bumumapa.mypressonline.com/60986856144.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/19662312684.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/hjsRjd0/mugilonago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_6037880845e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_5fd118e19a9bb.pdfIn PDF document text
    • https://jekakakum.weebly.com/uploads/1/3/0/9/130969489/8702075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468261/normal_5ff968cbc0c66.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jhhdXgd/fosagefazilapetativ.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/656267.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/hi9qjhp/cubacel_recarga_desde_el_exterior.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/honeywell_hyf290e4_quietset_tower_fan.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/putizalusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375352/normal_5ff3f4801f98b.pdfIn PDF document text
    • https://tokinuxo.weebly.com/uploads/1/3/4/8/134848772/lupitogibo-katod-dutase-ramofuduro.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/what_can_i_do_with_a_masters_in_exercise_physiology.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/kiejchg/17494029745.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/walaluxevo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fcea28c71180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5ff23a5bca26b.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/hhjigId/vuxijosofujeniboketikep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidusagi.atwebpages.com/how_to_turn_on_amazon_echo_dot_2nd_generation.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/basic_molecular_biology_textbook.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED5 5248 bytes
SHA-256: 957f0bbc8acc1758c168a62a45b2ff52bed1ff70296dd00b8c9dba60b7ee2139
font_01_sfnt_off000150c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C8 12148 bytes
SHA-256: d9f82db4e5976730d033799c2c2e6172a8402eebf061a9fff73f3e1edf21d1e4
font_02_sfnt_off00017851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17851 16028 bytes
SHA-256: 6e14d9a23925fbdd927c7db5f893cbd4d80a19524b1aae448d44ee15d2611241

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