Malicious PDF — malware analysis report

Static analysis result for SHA-256 458716df98318883…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 19:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 64562bfe11714037e0379f3b142a6b02 SHA-1: 14375eb6a4103d5578fac1b7cecfc08476a24a43 SHA-256: 458716df98318883dcd23e4f62ac999e8ae614f385c48d3cbb9aa41f875c71d1
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 0.9997

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://crophysi.ru/wix?keyword=guess+emoji+movie+answers+level+39 PDF link annotation
    • http://tublitalia.space/compare_and_contrast_bacteria_and_viruses_venn_diagramasjk6.pdfIn PDF document text
    • http://bigmagazin.xyz/window_envelope_template_for_letter7qt7l.pdfIn PDF document text
    • http://okrasote.info/formula_para_el_volumen_de_prisma_rectangular0fi7w.pdfIn PDF document text
    • http://es50off.pro/what_does_a_deposit_operations_specialist_do25en0.pdfIn PDF document text
    • http://flathead.us/1405088441306xci.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/kudefem/aegon_life_insurance_premium_receipt.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/rusepovagojasujufap.pdfIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_654913947bd7409c8fb05fb93bf12106.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/difference_between_new_testament_god_and_old_testament_gods.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/dixiw.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/fodomeguzobatowivapekema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18aa9b5b-d752-4345-8f87-5628715c0982/39159016844.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_9374a06c141544f7820e1d8376bcc574.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/4493125199.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/como_crear_archivos_comprimidos_en_winrar.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/antibiotic_prophylaxis_guidelines_american_heart_association.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/61552414924.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/google_chrome_extension_streaming_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/certificate_template_in_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/54371544366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2cf708-27e4-4f38-a8ec-f558da782848/wetusakegizet.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_de4d52ef6919464bb9bc3fe69607e446.pdf?index=trueIn 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_off0000fa84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA84 5412 bytes
SHA-256: f3fa7f2db36188706ecac9f84cba40473f5ce836b18584ab74a67301490fe4c6
font_01_sfnt_off00010ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE3 10740 bytes
SHA-256: abcbc0e6238acbc893d75fcdc650e533ed9b04430726b27da04c9852034391c0

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