Malicious PDF — malware analysis report

Static analysis result for SHA-256 af73592356d71988…

MALICIOUS

PDF

75.8 KB Created: 2021-02-20 04:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7a576910558ac92349a5b175370b7962 SHA-1: 9e2e82d6f769d3148f5676f3396106323a79c362 SHA-256: af73592356d719886acd9f7f4913f40c475fe01f0269df84dd99c076293f1857
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=insiders+cash+proof+of+funds+letter+from+bank PDF link annotation
    • http://ukranews.site/graduate_student_email_signature_templatexyh01.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/lufifuxixekava.pdfIn PDF document text
    • http://reguburobijoda.22web.org/tudurixunowaver.pdfIn PDF document text
    • https://bogibopedazite.weebly.com/uploads/1/3/4/0/134018154/1726fb3.pdfIn PDF document text
    • http://arbitestpark.xyz/4_pics_1_word_onlinerua6n.pdfIn PDF document text
    • http://reduslimitaly-official.site/memoirs_of_a_geisha_analysislqnj4.pdfIn PDF document text
    • http://jizimawaguda.22web.org/ireport_tutorial_sql.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/loroxinubixanxb8b.pdfIn PDF document text
    • http://speak4pro.com/fukoza23boz.pdfIn PDF document text
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/2fe23bf92.pdfIn PDF document text
    • http://xonibiz.22web.org/lonodelufax.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/besafefaf/vitedaniruko.pdfIn PDF document text
    • http://sejanaxopuvogiw.epizy.com/video_calling_app_kaise_kare.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/5e_barbarian_rogue_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/wipudewula.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/kexaworosulasosi.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/voice_recorder_app_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/55212795852.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/calypso_sheet_music_free.pdfIn PDF document text
    • http://jebaduditeruvix.rf.gd/asbestos_sheet_removal_cost_uk.pdfIn PDF document text
    • http://rerorexemebiliv.epizy.com/give_advantages_of_cascading_style_sheets.pdfIn PDF document text
    • http://puxejinasor.epizy.com/muvuvajapifon.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_off0000dd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8C 5416 bytes
SHA-256: 0ae62653a67ebf2f300052ee103a217afec59898a4890cb1324fe00d800ccd5a
font_01_sfnt_off0000efb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 10404 bytes
SHA-256: 698726103fc68a71b549a742c9380fe788f821af462bf6f302f2e68e18aa4ef3
font_02_sfnt_off0001135c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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