Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec9adc87e8955ac…

MALICIOUS

PDF

66.2 KB Created: 2021-02-02 12:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 68d70f56e26e01aa85f9de396d357ddc SHA-1: 159e880c2b77ce3db4c1be67b1a5dc0a801f09a3 SHA-256: 7ec9adc87e8955acdef8bd1ae150ab85d55e35c407f98100b2d084fb5e4267d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating a PDF link farm containing numerous external URLs. The presence of multiple suspicious URLs, including those hosted on weebly.com and custom domains, suggests an attempt to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution scheme.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=beaded+hat+bands+australia PDF link annotation
    • http://lnstagramcopyrightmanagement.com/xilifoxeginodaxuwadixavudxnx.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/aaa4bcc4.pdfIn PDF document text
    • http://probnik1313.tech/41794293952z7jjc.pdfIn PDF document text
    • http://hugertely.xyz/latibagodoxzwxae.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/dd138df7d0.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/e9123b10f.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/23125f.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/HjdpgcT/soft_serve_ice_cream_recipe_for_commercial_machine.pdfIn PDF document text
    • https://lifexego.weebly.com/uploads/1/3/0/8/130874678/xeligizogamepib.pdfIn PDF document text
    • http://idealica-official.website/jumivatofenixotuvixig4jhk.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/lorifawuvawot/naruto_shippuden_kizuna_drive_iso_ppsspp.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/herman_miller_aeron_chair_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/1099_barter_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/20395832525.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/situational_analysis_template_free.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_off0000c581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC581 5100 bytes
SHA-256: 4b2b548092c5f49dab029653ac8edd713638b90704fdbf3946ca369e530f78b1
font_01_sfnt_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 10972 bytes
SHA-256: 96351b713b7c487e6e7fef9f6caa3472f9a9177a86573858c2b5d43c1f77cc38

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