Malicious PDF — malware analysis report

Static analysis result for SHA-256 13953f17c2ba3900…

MALICIOUS

PDF

87.0 KB Created: 2021-05-24 22:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f3e263459e863e5670fdbf149b7459e1 SHA-1: 43c4fbaa2c681194d925c1c86451cb36f25c1f34 SHA-256: 13953f17c2ba3900fc91cc77949beb3bb77605721af0972c79d0a81a8dcc5b71
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=mapa+planisferio+sin+division+politica+sin+nombres+para+imprimir PDF link annotation
    • https://vajibudutoneraz.weebly.com/uploads/1/3/4/3/134345344/xabajisisexukif.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/7701382.pdfIn PDF document text
    • https://datipozor.weebly.com/uploads/1/3/0/8/130813945/0eb84.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/wawatib.pdfIn PDF document text
    • https://juloxiwam.weebly.com/uploads/1/3/5/9/135967800/7513963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_600977f2ef25c.pdfIn PDF document text
    • https://werirubiteda.weebly.com/uploads/1/3/5/9/135972418/d84754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_602b6e4d95d12.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/988585.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/cds_1_2019_answer_key_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c059b962-aee9-4805-83e6-1f5617b1cafc/cuanto_equivalen_50_gramos_en_mililitros.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/meledasogotevezafomegu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/chc-_u01_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/how_to_setup_ooma_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a96f5f-7a3a-402c-8868-2ca316b14209/where_did_aboriginal_art_originate.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/body_massage_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/nuvinunuganilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551bd9e5-e14c-47bb-a9b4-9dc87fc8acfd/kusuvolurelikenaxudipog.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off00010a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 5504 bytes
SHA-256: 20fbf296a8c1434c61f82ceb254650d369e8d5b5f587e65423f4927c8f122549
font_02_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 1932 bytes
SHA-256: 79146b382a30d57b86cd31aee382fdde8e94a7721889692ffed962feefcb06eb
font_03_sfnt_off00012614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12614 11492 bytes
SHA-256: ecb535ee8c378b4d94a2e6834dd502fdff20898a2552f66aa8b0ec8003dc0129

Open this report in the interactive analyzer, or submit your own file for analysis.