Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aae3df24543ad8f…

MALICIOUS

PDF

136.6 KB Created: 2021-03-22 21:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bceb282a20d3a23e7429efef62a0486d SHA-1: b036e723c1bf044012052b7b559dd1cf87d5d62b SHA-256: 9aae3df24543ad8fbdd47311bbc0f4c3666eec9d863b9e6488a6c0648a27501f
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary malicious URL identified is 'https://dugedepap.ru/strik?utm_term=ic+718+manual+em+portugues', which appears to be a redirector for a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=ic+718+manual+em+portugues PDF link annotation
    • https://cdn.sqhk.co/jabosuve/iiih4cq/knife_throwing_classes_nyc.pdfIn PDF document text
    • http://easybranding.org/pomanajitojuvuled01lsw.pdfIn PDF document text
    • http://bluebadge-support.com/godukasilowolopilef4h41e.pdfIn PDF document text
    • http://smilex.club/bulutadizavadoluwikoke33lgh.pdfIn PDF document text
    • https://sizuzevejej.weebly.com/uploads/1/3/3/9/133997482/roluluzenokewe_zaxapumixalad_mezowi_riwasekukum.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/gAiiWns/taman_safari_call_center.pdfIn PDF document text
    • https://vekatofe.weebly.com/uploads/1/3/0/7/130775682/guvagofobitonakupipe.pdfIn PDF document text
    • http://vigastlens.xyz/what_are_the_abbreviations_for_cooking_measurements1ydjw.pdfIn PDF document text
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/fukiji.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/iDSijGu/51744333767.pdfIn PDF document text
    • http://ketotreno.buzz/ge_xl44_gas_range_partsf5y0d.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/hhgcjam/76648728282.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/70231484143.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/miniclip_games_bubble_trouble_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/19517813452.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/transformar_radianes_a_grados_centesimales.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/zemobibatole.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/descargar_zacarias_ferreira.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C955 1976 bytes
SHA-256: 277d1ec240db6cf53b384f7aa31c6e8f2646be53aa2b75139ca3729f4792ee36
font_01_sfnt_off0001d248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D248 5516 bytes
SHA-256: 6d295c49b141d680fae198a167da12b1e80c4a1f6400cea70de4eef11ee746c7
font_02_sfnt_off0001e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4FD 16508 bytes
SHA-256: d52bc44cc8ee9ddfe43eec422471ba86e564f3510842ca804cbf1d8a1e2fb27d

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