Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1976146abde5e3c…

MALICIOUS

PDF

75.7 KB Created: 2021-05-10 07:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 140ebd61f4895e86ea2cc80c5ad66401 SHA-1: beef71b507c98ed8622c7b1bbbc6d9832a801bdf SHA-256: b1976146abde5e3cfd5061668263f979a8a32b165270c2a90a8987b5e10df219
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, https://dugedepap.ru/strik?utm_term=asurion+verizon+affidavit, is presented in a context that mimics a legal affidavit, likely to deceive the user into clicking it. No scripts were extracted, but the extensive use of external links indicates a probable attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=asurion+verizon+affidavit PDF link annotation
    • https://bumekutuwa.weebly.com/uploads/1/3/1/4/131452846/medixurepiz-robuxoleraj.pdfIn PDF document text
    • https://vagofavom.weebly.com/uploads/1/3/4/4/134486407/9913265.pdfIn PDF document text
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/totiwuw-datejixavewulad-mekako-pefegovumifojas.pdfIn PDF document text
    • https://vozupawugenebib.weebly.com/uploads/1/3/0/7/130776609/jofojis.pdfIn PDF document text
    • https://mutosonagok.weebly.com/uploads/1/3/4/3/134316738/lutobebojebu-givigi.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/7420121.pdfIn PDF document text
    • https://lotatodekimin.weebly.com/uploads/1/3/4/7/134705716/nukutepebada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zavinawotomuvef.epizy.com/outlander_novel_vs_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76acbbe-8380-4384-9a50-2073e5bac62a/kareb.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/what_is_a_metaphor_in_the_tell_tale_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/free_business_letter_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/evan_moor_science_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e3b233-7da9-48a4-a358-1274363ae70c/how_to_make_still_life_drawing_fun.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/36467527619.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/how_to_change_lawn_tractor_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/71808346687.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/berberine_metformin_pcos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02284146-5d4d-4b11-856e-239ecf6e8201/74298664750.pdfIn PDF document text
    • http://kavaxix.rf.gd/18396898416.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_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 4968 bytes
SHA-256: b44f5165c242141e86f315fc325e81ea4981577b99f999c6abf8635b3c52f0e9
font_01_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 10448 bytes
SHA-256: 124471f07e6bd31d6c4f8c32ca4419cb37bb4aee129be08cb08eea074b22b902

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