Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a3eb38b31e4a19…

MALICIOUS

PDF

76.9 KB Created: 2021-05-21 05:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff2b3fc2ed8b1a03087af7457a07c6aa SHA-1: c4d10368a3e0d574628a0c944a89fdc57bbc0f24 SHA-256: 89a3eb38b31e4a1937344fb60b67f09c7f6f223791de753144d1ade26154f46b
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 0.9998

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://soxebez.ru/strik?utm_term=why+is+my+fire+stick+remote+blinking+blue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373008/normal_603c1a23b2925.pdfIn PDF document text
    • https://fikugutadopoxas.weebly.com/uploads/1/3/4/3/134340330/kaguzamo_komopamazom_benavatekimoze.pdfIn PDF document text
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/litunud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_6037762a0b3ef.pdfIn PDF document text
    • https://wutusexiradolo.weebly.com/uploads/1/3/0/9/130969471/siwuzo_bezubijora_tewifevakose.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/85571156441949.pdfIn PDF document text
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/kosevewuvufototowi.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/1ab9a5f5-ca0a-42db-8226-9f0f7800af8b/24378423102.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/dyson_ball_vacuum_suction_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/duvet_cover_bed_sheet_set.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/splatoon_2_inkling_language_translator.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/divutegito.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/abakada_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901cd68c-2feb-4531-820c-e5947438fe1f/74003759130.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/muradavajusupi.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/8180451372.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/baixar_bncc_educao_infantil.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_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 5404 bytes
SHA-256: 37e7c39cf02ec144aaa8bd56565886b51523f3abd0b617b89fc33a56fe6d7f98
font_01_sfnt_off0001031b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031B 10380 bytes
SHA-256: 2b2e2c0969c525cb09a9d709634b33b93d7212c379ffc2f7d32a58002a500f7a

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