Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf08e2d659a13de…

MALICIOUS

PDF

71.3 KB Created: 2021-03-13 19:16:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a3e4702511f8b0eb2143cab0ad2ffa94 SHA-1: f6549a449a9e132d78aede89d3d7e54d8d5c853c SHA-256: bdf08e2d659a13de4b14163589fb855417bca373b057fd1a7c64fc94d048c987
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a significant number pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to 'knowledge transfer template ppt', which is likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dugedepap.ru/123?utm_term=knowledge+transfer+template+ppt PDF link annotation
    • https://cdn.sqhk.co/lojosexotak/IgiM31y/jitisukujimogujolemamawik.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/firutap.pdfIn PDF document text
    • http://service-hire.com/merlin_5_sezon_trke_dublajd8guc.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/hjiUTgd/1562027818.pdfIn PDF document text
    • http://fuvufurewuf.iblogger.org/exercice_corrig_de_atomistique_s1.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jhjG2hh/59120994467.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/65048832841rjwi2.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/xelemabox.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/lincoln_electric_ac-225_stick_welder_manual.pdfIn PDF document text
    • http://shimano-stradic.ru/49547229995wtbzv.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/taxpayer_bill_of_rights.pdfIn PDF document text
    • http://indital.fun/genafewiwaxaxogimebosomc7slv.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/aLiihdj/genuvotawaso.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/fulikobobajulitobovokomul.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/inorganic_chemistry_notes_iit_jee.pdfIn PDF document text
    • http://ygrash.website/gidetoxusirufe8id0g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/volume_booster_pc_windows_7.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/is_the_dark_tower_book_appropriate.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/f_i_r_long_form.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/48656230434.pdfIn PDF document text
    • http://zimunumiwu.epizy.com/59629157403.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/kugasifupajiwojajati.pdfIn PDF document text
    • http://duvodix.myartsonline.com/66060973471.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/leadership_coaching_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/reporting_homogeneity_of_variance_apa.pdfIn PDF document text
    • http://vuvuparitika.rf.gd/89039619888.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_off0000d85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 5424 bytes
SHA-256: 597313014bfb68a336a8244f43898f449c3599bf06100fa552eddb349adfec90
font_01_sfnt_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 10900 bytes
SHA-256: f742ea3aac0bcc42ece07f7b722f7ccf899d3d9b9abefa7b583971fed72ba2a9

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