Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa32b37ad881370…

MALICIOUS

PDF

77.3 KB Created: 2021-03-20 06:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8cf6495a69d9f0139f2948cddaca8233 SHA-1: 9f7500d6f1f77531aba514f0fed88629514ee649 SHA-256: cfa32b37ad881370a6335f12c9beb11ac3b96654e4a9c4774467176d20928411
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 0.9996

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://crophysi.ru/123?utm_term=abraham+lincoln+speech+pdf PDF link annotation
    • http://marketitaly.info/power_pressure_cooker_xl_chicken_and_rice_recipes3d0w1.pdfIn PDF document text
    • http://4d-5d.com/how_to_use_ti-36x_pro_calculator198w4.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/wedaboxopoxawezevupax.pdfIn PDF document text
    • http://shtangye.xyz/weather_atlanta_november_2018ok0yl.pdfIn PDF document text
    • http://cheeronthemove.store/893773304289o6zc.pdfIn PDF document text
    • http://golomashvanna.xyz/86319056966dbsvm.pdfIn PDF document text
    • http://lessonsonline.site/389190802968jkg8.pdfIn PDF document text
    • http://megantv.site/87840105909x168e.pdfIn PDF document text
    • http://voicebftyi.com/the_things_they_carried_ambush1nvj2.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/1f83b1e1c9ebd.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/how_to_open_a_zip_file_in_garageband.pdfIn PDF document text
    • https://fudolimag.weebly.com/uploads/1/3/4/5/134586879/poroforokawuzapi.pdfIn PDF document text
    • https://tomavibevojivow.weebly.com/uploads/1/3/4/0/134016690/mavorixepapi.pdfIn PDF document text
    • http://fringigejy.site/jitedugorumifimuroovvk.pdfIn PDF document text
    • http://white-x.fun/currency_trading_app_androidlc92l.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/18d21ffeb261f.pdfIn PDF document text
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/6307082.pdfIn PDF document text
    • http://supernefritroller.xyz/nutemexotieqjce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_6042f3166e0c3.pdfIn PDF document text
    • http://naturebiolog.space/13753562476p388b.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/79598088650ovf9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_604acf8c3823e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 5524 bytes
SHA-256: 0cc4ddeff568bb08b686b1023707ec3bb3974463b19f506015066aa3a7d91d2c
font_01_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 10608 bytes
SHA-256: bbdb0f9ea1de4c4af27c73f43329c5a2221ebcb0c267392b145942635832e6bd

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