Malicious PDF — malware analysis report

Static analysis result for SHA-256 2921c898308389eb…

MALICIOUS

PDF

76.1 KB Created: 2021-04-06 06:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4ee70e68c9f5c279e73f3a54ceb17dc SHA-1: 9801c09f25b7335945f6ac972fe317381314dd1f SHA-256: 2921c898308389ebb249c43197d51923a5d75b4a4ac1a23e54d6675a16bc2547
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://seumenha.ru/wix?keyword=xcore+sprinkler+manual PDF link annotation
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/barojupil.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/3349804.pdfIn PDF document text
    • https://cdn.sqhk.co/kigezarokoji/ifgQfdP/5974264303.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/bheWAib/vavajoma.pdfIn PDF document text
    • http://xejevojesinil.22web.org/wamekukimirenular.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/5VWgjKg/best_smoothie_maker_ninja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_6025b383ce4fc.pdfIn PDF document text
    • https://wezobugedelu.weebly.com/uploads/1/3/1/8/131856743/5811360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6019c5037602f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455657/normal_6065a98181b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_6032adb9039a5.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/vavabi/gy6_engine_measurements.pdfIn PDF document text
    • http://xezedif.epizy.com/kibbles_and_bits_feeding_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/lutidovebanumu.pdfIn PDF document text
    • http://jepojofugag.rf.gd/basics_of_financial_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/tokos.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/mogisinakoxemigepi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/tezogoponuvek.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/faruninibasutidafimexoze.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/milebafapipitotujep.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/aidl_file_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/el_libro_de_los_muertos_tibetano_resumen.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 5120 bytes
SHA-256: 05d6773ab23d52a98d8144d72c5c859e0a14bbce3c487af85dc241502a337684
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 10992 bytes
SHA-256: caf3e235b813eab113bbef46850f6f11cd92274986409cade08cdf1492d34e0c

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