Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded30b0e70346d13…

MALICIOUS

PDF

76.9 KB Created: 2021-03-07 11:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0966f5d5783812edc7a507a08befbdf0 SHA-1: 857b6bef6bf9155acc2776e1f313ef3d62fafaf8 SHA-256: ded30b0e70346d131b90b1b1241b431832d08671a9887b7a132df2768bbcecfe
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://vilenefex.ru/aws?utm_term=easy+crochet+baby+shoes+for+beginners PDF link annotation
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/1366262.pdfIn PDF document text
    • https://sufodawopej.weebly.com/uploads/1/3/1/4/131483154/5f00e8377424.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/delobifulum.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/nexewaxanap.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/wd_my_cloud_admin_log_in.pdfIn PDF document text
    • https://remezovegaz.weebly.com/uploads/1/3/1/4/131406605/390d59.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/6249965497d8e.pdfIn PDF document text
    • https://lalotuzeguraja.weebly.com/uploads/1/3/1/3/131383936/xiwifoxiforebavem.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/2012_chevy_impala_ss_oil_type.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/8035180.pdfIn PDF document text
    • https://tiwozujipi.weebly.com/uploads/1/3/5/3/135317022/9274715.pdfIn PDF document text
    • http://nigufuf.iblogger.org/rearranging_linear_equations_y_mx_c_worksheet.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/mivuxu.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/lixafonisogakiza.pdfIn PDF document text
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/wonevuwugekitu.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/nizive.pdfIn PDF document text
    • https://dominegum.weebly.com/uploads/1/3/4/3/134370126/2676a7235da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pumatelikowe.epizy.com/72821143552.pdfIn PDF document text
    • http://votenumilo.rf.gd/types_of_non_arguments_with_examples.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/simple_past_tense_regular_and_irregular_verbs_quiz.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/takusules.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/beats_by_dre_solo_3_on-ear_wireless_headphones_-_red.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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 5308 bytes
SHA-256: 924af26e4ff99657eced9fc47553523ece7f63ae74ee69324b4982b6ddbf329b
font_01_sfnt_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 11112 bytes
SHA-256: b983b1d106d1da7833f7348ff2e4dd04792085c56a679dcb0a549781d2bc187d

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