Malicious PDF — malware analysis report

Static analysis result for SHA-256 591ec3541f66f825…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 22:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5afdb8a1655fbb739b61822c8e879a8a SHA-1: 3f4977c3fb475ca9cb19a8a85a661bdac93e01d3 SHA-256: 591ec3541f66f825aa7293b2e04aa0f748c003d06c0dc42b0931334ba88bb3de
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'bologen.ru' and another to 'getbuiss.online', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for such lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=metaphors+in+macbeth PDF link annotation
    • http://getbuiss.online/840339699965juye.pdfIn PDF document text
    • http://nowojamedomi.22web.org/sutebegotobagazafaxaba.pdfIn PDF document text
    • http://ejinaya.com/56309405084xprmg.pdfIn PDF document text
    • http://axecheat6.xyz/642438334746vs3x.pdfIn PDF document text
    • http://tizezs.xyz/luwuwukimanuwadilebid263e4.pdfIn PDF document text
    • http://kopirugi.iblogger.org/49465149546.pdfIn PDF document text
    • http://jexujililizatub.22web.org/sofa_table_3d_model_free.pdfIn PDF document text
    • http://bioforce-co.site/pulanidazibxr6yb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolopanezodubun.rf.gd/66936155997.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/12_math_rules_that_expire_in_the_middle_grades.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/58931389186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14933d1f-98e0-4c87-ac8a-02292369c348/5_love_languages_by_gary_chapman.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/kesakipuxu.pdfIn PDF document text
    • http://tugurodegid.rf.gd/my_name_ringtone_akash.pdfIn PDF document text
    • http://sagunum.rf.gd/xajenanakalusafan.pdfIn PDF document text
    • http://kumoxamumusuxa.rf.gd/jatugotimumilonufodin.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/zilefetore.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/21633802614.pdfIn PDF document text
    • http://begokev.epizy.com/colorimetric_determination_of_copper_with_ammonia.pdfIn PDF document text
    • http://farudigenudoze.onlinewebshop.net/pibaralesotesuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ae6816-4a71-4ca8-ac90-123ce41a16da/mofivam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e87a56e-6c86-40a2-a1bb-52820fb69cd7/58539597819.pdfIn PDF document text
    • http://javasuk.epizy.com/xirapixalajozizofimezoj.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/samelawedovotalato.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_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5288 bytes
SHA-256: 70f5559ad2fd0590b2d0c5e452045aaa0b52454b907aea5c58bbb264f70f5a43
font_01_sfnt_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 10836 bytes
SHA-256: 5fb042bdd1049e7b6cc428fcc46ee97c189875a6e1d9e4a00a6973198239fb6b

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