Malicious PDF — malware analysis report

Static analysis result for SHA-256 f496067ae71ef409…

MALICIOUS

PDF

106.2 KB Created: 2021-02-23 20:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4983f9a39aef51159e79d584c6dbdda6 SHA-1: b12a1f9f3819ec7deeb432d5fd79af6cd1fdef1c SHA-256: f496067ae71ef4095e691081cd5219c5fbedaba8f0a7e36753360c45ceb22880
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm and a high-confidence ML classifier flagging it as malicious. The document body, though heavily obfuscated, contains keywords related to 'European imperialism in Africa natural resources' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of external URIs and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=european+imperialism+in+africa+natural+resources PDF link annotation
    • http://kesenirevapovid.iblogger.org/rebojeruteluk.pdfIn PDF document text
    • https://sevexuwajewedov.weebly.com/uploads/1/3/4/5/134508994/rugukuz.pdfIn PDF document text
    • http://wordsidepost.top/new_moba_games_2019_androidobdri.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/6657362.pdfIn PDF document text
    • http://antinomi.design/kigewefikanilejamareq9za1.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/mikegepakefuveb.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/3c3bdc9e144058e.pdfIn PDF document text
    • http://maska-respirator.shop/topopud28e0.pdfIn PDF document text
    • http://tuworiki.22web.org/android_game_console_for_tv.pdfIn PDF document text
    • https://dopeziporop.weebly.com/uploads/1/3/0/7/130739225/sitovewivukoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/votiturobomopujudimatan.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/cima_connect_examiners_report.pdfIn PDF document text
    • http://zaramapowo.rf.gd/uric_acid_test_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/99108647109.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/62006883634.pdfIn PDF document text
    • http://ninivekav.rf.gd/unication_pager_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/4593245481.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/24829938245.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/ff14_goldsmith_leveling_guide.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_off000158df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158DF 5000 bytes
SHA-256: 8fec790f96f0e937a6b0cbd7eb937461107f8a6d0cf79ad562d448909957e284
font_01_sfnt_off000169c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169C9 10196 bytes
SHA-256: 79bd5d878a43cb33e150063d5036e16e1588fda303b49e10f0fcfd948e6d2b4f
font_02_sfnt_off00018ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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