Malicious PDF — malware analysis report

Static analysis result for SHA-256 631f3917fbf97a88…

MALICIOUS

PDF

68.4 KB Created: 2021-03-30 20:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cdd5b6e3d159e4426942ccf5cb696112 SHA-1: 3e1a6aee7e696ffd220981063ea130bbac845083 SHA-256: 631f3917fbf97a88ef1b000d9e9dbf6f4568d97969bf33afbf884073152b1d76
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://jottigo.ru/award?keyword=modele+attestation+de+prise+en+charge+d+un+parent+pdf PDF link annotation
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/2476478.pdfIn PDF document text
    • http://xedopib.22web.org/41140990975.pdfIn PDF document text
    • https://cdn.sqhk.co/sanobude/Y8Nzuii/2019_deer_bow_hunting_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/gchfsUb/18087292498.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/8082360.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/eIgeghq/is_64_bit_faster_than_32_bit.pdfIn PDF document text
    • http://fowevuwakit.22web.org/what_is_public_enlightenment_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/eWhgYv7/hello_neighbor_switch_walkthrough_act_3.pdfIn PDF document text
    • http://fosexodepaga.iblogger.org/93519938646.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/eLgvjba/wijukosejidele.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/zieijI1/28182041637.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77091600-c060-4ed0-82a5-f835571b91d0/paxugebuxibaxab.pdfIn PDF document text
    • http://wubezitapafa.epizy.com/java_se_8_jdk_archive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72340bbc-3312-4ee6-9ba9-7fb02dd3f2fb/vekitef.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/honda_rebel_250_carburetor_diaphragm.pdfIn PDF document text
    • http://madanekobovuge.epizy.com/hair_cutting_boy_image.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/1950395112.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/decathlon_india_sales_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff914c7-ee0a-4a35-81f0-a99fc8075fa6/how_to_use_dyson_animal_2_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e608a57-0cf2-41f1-8ac4-09d4e833a1ee/goriz.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/simple_meeting_agenda.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_off0000ccb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB6 5424 bytes
SHA-256: 14c811890b5ebb47e94c7c92a9a4a1f7bfc6d25fd541f56b957674fcf6a219e4
font_01_sfnt_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 11312 bytes
SHA-256: c8c8834449c0ace64fe2047b40961947e597d833a2822ca0f2ff83d93ecb0992

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