Malicious PDF — malware analysis report

Static analysis result for SHA-256 55238f063691d2c3…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 23:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 08f73cfbe6943c1cc6f991341772dbe5 SHA-1: 544575910ce84ea10106a36cb8e134944fac475d SHA-256: 55238f063691d2c3901f5fadb0cee1a1744bc39cf50d082b1a7aa575bf1d619d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicative of a phishing or ad-revenue scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=para+que+sirve+la+tecnologia+informatica PDF link annotation
    • http://rikaseligexodiz.22web.org/94032528182.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/icwhbgc/mofepuzagunad.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/P9N6iaf/28841850717.pdfIn PDF document text
    • http://desekikimok.22web.org/62198172277.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/vBcgcie/43582955342.pdfIn PDF document text
    • http://solimabifiper.iblogger.org/what_fast_foods_have_gluten_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/BLhiXN1/article_spinner_and_rewrite.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/eAjehgf/33002256611.pdfIn PDF document text
    • http://ralanizu.iblogger.org/12042563173.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_32dbb51b61a2415eb47eb3e41d546080.pdf?index=trueIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_fb4361fac57b46ef9256ba015ddd985d.pdf?index=trueIn PDF document text
    • http://paxutujunix.rf.gd/reduction_of_relative_clauses_test.pdfIn PDF document text
    • http://puxakuxuvon.epizy.com/93970372623.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/volume_formulas_for_all_shapes.pdfIn PDF document text
    • http://jijeledinevo.rf.gd/what_are_the_pros_and_cons_of_tidal_power.pdfIn PDF document text
    • http://judumiji.epizy.com/kadubajobiwow.pdfIn PDF document text
    • http://zatigiragu.epizy.com/33138868044.pdfIn PDF document text
    • http://kodejosukiraxel.rf.gd/finorogodadoluluf.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_9fcb80ccb70049e68f716b024d081f9b.pdf?index=trueIn PDF document text
    • http://nasuxenabo.epizy.com/patterns_in_network_architecture_john_day.pdfIn PDF document text
    • http://lovenewaw.rf.gd/83592598963.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_off0000f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B 5388 bytes
SHA-256: 966eeba0aed490bd820aeaf0c38004b111747eb5d28cf12bd2abf873497b7579
font_01_sfnt_off00010857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 12012 bytes
SHA-256: 93b31c6768a7fa1fd68be79c33f5b896406f078418c603546969f1b5a5be2fb3

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