Malicious PDF — malware analysis report

Static analysis result for SHA-256 58988cc328cf5a5c…

MALICIOUS

PDF

84.7 KB Created: 2021-03-12 19:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f0d33a5004adf8866b52e22191ac38d0 SHA-1: 82c79edf28cf81fb8e3ba35c9e946cdd2f3b6925 SHA-256: 58988cc328cf5a5c48a5176e36eed53bd85e6ce09d223fc6a94e91db1ecc2a91
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 0.9990

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://pelibifir.ru/strik?utm_term=the+joy+of+less+review PDF link annotation
    • https://cdn.sqhk.co/bomoxale/cihjahi/tinolu.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/57253693784.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/86585010755.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/hcji9Fb/85347186542.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/9640862.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/9jaehiP/cdf_vs_statistics.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/91965349430.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/zotis-bejeg-xemutoruda-rutidaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5fcb0370dade5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_601daab3af0bd.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/ghamCMq/cisco_asa_security_plus_licence.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_603e35d4d0cff.pdfIn PDF document text
    • https://duludogom.weebly.com/uploads/1/3/4/6/134673238/mategewikofukeg_mejapig_zubugod_taporevuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5fc924e7cc792.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/judezutamozarewugi.pdfIn PDF document text
    • https://cdn.sqhk.co/fitodofafe/hgfibjg/zutatapeji.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/ce931fdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sakaburepagase/32322554154.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/9587634882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b3d0f7-581b-4b29-824c-0a2bd5f358a2/vagigomuxinibupox.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/allianz_bireysel_emeklilik_iptal_formu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/tcp_ip_network.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/16284326499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485fab3f-73b7-42cc-abc8-1e2394f7de23/aroma_10_cup_rice_cooker_and_steamer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 4524 bytes
SHA-256: 14b395ce487c1b62909ce03e5ad9d6a3b94c41baa668cf0dfa887bde454c5cdb
font_01_sfnt_off000112c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C5 10996 bytes
SHA-256: 2e2f76b38f8432d8be361d8383c8af5816f7b62673fb2bbff12a8981fac012ba
font_02_sfnt_off0001374c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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