Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd62340790b7893…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 10:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 385d70c423d3d3f74804bbfb739809c5 SHA-1: c660ad0534f89d6169b1bc6500bba44fcbcc56c4 SHA-256: 1fd62340790b7893358437180a8598e761394ee6129d09de94d9e1523e9c4240
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs and is classified as malicious by ML and ClamAV. The document body, though heavily obfuscated, appears to be a lure related to refrigerator repair, directing users to a suspicious URL. This suggests a phishing attempt to redirect users to a malicious site for further exploitation.

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://druttle.ru/strik?utm_term=how+do+you+reset+the+ice+maker+on+a+samsung+refrigerator PDF link annotation
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/gupowadekujebusaliw.pdfIn PDF document text
    • http://nipokafusili.iblogger.org/anova_reporting_f.pdfIn PDF document text
    • http://cmbclientes.com/55753250328bbcj3.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/is_kawasaki_oil_good.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/66101392061b8j9z.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/vanuzakuz.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/48c1c0b4f6018.pdfIn PDF document text
    • https://debefapedokofip.weebly.com/uploads/1/3/4/3/134373265/2077443.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/sefabe/motisog.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/kinemaster_cracked_apk_revdl.pdfIn PDF document text
    • http://vakogez.myartsonline.com/sig_sauer_p226_bb_gun.pdfIn PDF document text
    • http://nomijedelalevi.rf.gd/feneguvixudow.pdfIn PDF document text
    • http://kunizifafam.epizy.com/lake_guntersville_crappie_fishing_report_2019.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_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 5624 bytes
SHA-256: f8d858b0e9c3545f1051d049337fb3aeadecd792db40885132fa7de2e57cc3e8
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 11256 bytes
SHA-256: c9479d0f38047ef52d03696928e5899f820bd5b76e649d87006d5bff2937e613

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