Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b3aeea5d072b92…

MALICIOUS

PDF

76.5 KB Created: 2021-03-19 12:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df186a210ec675558299fe07e8555baf SHA-1: 56a3c6c37335117347de11ca048c50eb87af6bc4 SHA-256: 22b3aeea5d072b9264e62e40e8ae4f935cfdfdf36ba567c6d02ce1c4d1ded3c4
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=resume+worksheet+for+college+students PDF link annotation
    • http://wozupabalaviv.medianewsonline.com/31804781618.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/farutidokesagug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_60069c9bd85ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6045bd3aaf921.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469828/normal_6001d6e8663a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_5fdd2778a4b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_6036d361a610a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_60369375497dd.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/84502509696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_60537c7f84897.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/7824937047.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/lerezazo/naxogo.pdfIn PDF document text
    • http://wubijati.epizy.com/monthly_sales_forecast_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/milafimimebomubutewugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafe27fe-0237-4617-9387-4c601b4799f1/87826777514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d453d53c-9438-482f-99b8-050663bc9012/westinghouse_32_inch_tv_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c7197b-e8d0-4200-8ee8-d3acdd66507b/57795358283.pdfIn PDF document text
    • http://bakotisimipivok.rf.gd/rerarilokapupokijetizeji.pdfIn PDF document text
    • http://lamupilabixekuw.epizy.com/tomusebofar.pdfIn PDF document text
    • http://jipinasin.epizy.com/buick_regal_grand_national_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/how_to_use_wd_my_cloud_for_time_machine.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_off0000eb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB12 5388 bytes
SHA-256: 89c1416a4471f3942e765e641b6dbdd4390c72d6f0562d969bc257a48f5fad41
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 11108 bytes
SHA-256: 237c1d5d6cb975385a77d56531622da3330c5313845a9aaffec3699134c654b5

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