Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad85e9531c56b02…

MALICIOUS

PDF

77.2 KB Created: 2021-04-12 20:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 76cb52f569c6fb0db97920c58edec0d6 SHA-1: 54b3d050b8fe2a253da6880c5b57ee196e0e40c4 SHA-256: fad85e9531c56b02ddb5e4e7c31cb29cf15f5e9b9b8beb95907a105a3117165f
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 0.9998

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 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://mezovuduw.ru/strik?utm_term=how+to+turn+off+viper+remote+start PDF link annotation
    • http://xedopib.22web.org/pocket_oxford_chinese_dictionary.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/wojuxeve-dobotamojos-xonew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_603ba3d29fe45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fe37f8481380.pdfIn PDF document text
    • https://nifilova.weebly.com/uploads/1/3/0/7/130740060/8336219.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474719/normal_5fef444281d5e.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/xotusedupowamodugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5ff1b018d87fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talifox.rf.gd/zupaxesu.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_f56b0dc2e0fd4f28bd1c0ce1db03d9c7.pdf?index=trueIn PDF document text
    • http://rolawitakomot.rf.gd/35809658844.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/35188134251.pdfIn PDF document text
    • http://xodupope.epizy.com/ambient_weather_clock_manual.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_4d8989a6fda545efa88635709f254d2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/extranodal_lymphoma_contouring_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/mukabojisifixo.pdfIn PDF document text
    • http://ratosore.epizy.com/83030934807.pdfIn PDF document text
    • http://dupunijasazo.epizy.com/zimafuwazuvedetosituwate.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_fcc4be8eafb44f3aa1af8ac67cb9e337.pdf?index=trueIn PDF document text
    • http://begosene.epizy.com/capuleti_e_montecchi_libretto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 5128 bytes
SHA-256: 03508fd0fe45d70cdbdaf00d2311e565a068d4bc5bcd9b803fcf133bb926f543
font_01_sfnt_off00010121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 10592 bytes
SHA-256: e3928f9dbaaebf730c33985cab1476a32a028f2de6b3cb82c7ccb23743f44c0a

Open this report in the interactive analyzer, or submit your own file for analysis.