Malicious PDF — malware analysis report

Static analysis result for SHA-256 3951b2a3cdd2d33a…

MALICIOUS

PDF

83.8 KB Created: 2021-03-02 06:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 190d0dcf691d113561d5eb0c642cac8a SHA-1: f9f82c6f09ae46069c15933c9672dfa6711266aa SHA-256: 3951b2a3cdd2d33af111bba291d55ab9bd10ce53efe7f9ee59486d490689281e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to product specifications, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=sony+dvp-sr210p+specs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5fcb92e0706ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_603d8aa75a417.pdfIn PDF document text
    • http://shopsupergood.site/chhota_bheem_movies_3gp4rwy3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fecf9918ffbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602018bd90d9d.pdfIn PDF document text
    • http://dkmz2.club/the_human_brain_nolte_free_download3cdtu.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/biological_sciences_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_603a44e818b89.pdfIn PDF document text
    • http://dovulup.iblogger.org/photographer_job_description_template.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
    • https://s3.amazonaws.com/busutafitufe/abhinetri_movie_ringtones.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/98429153946.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/7767986088.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/ten_ton_hammer_artificer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/my_grandma_got_run_over_by_a_reindeer_show.pdfIn PDF document text
    • http://minudumira.rf.gd/konasi.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/rikuwavu.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/10006526124.pdfIn PDF document text
    • http://vetozidute.rf.gd/purevpn_openvpn_server_list.pdfIn PDF document text
    • http://luwomami.epizy.com/metformin_500_prezzo.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_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 5108 bytes
SHA-256: f741e6c44c30e0fed2456687e62b8172fb33751b60ef34b5304af442314ffddd
font_01_sfnt_off0001107d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107D 10324 bytes
SHA-256: 9ee7ff1ad7b0d5fac9a33e1b37357868dce7dd1796b82188c480101636adf2a0
font_02_sfnt_off000133d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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