Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed358c0fc055899…

MALICIOUS

PDF

30.6 KB Created: 2020-11-01 06:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3ed65e55a4c6cd5ebfb28ea339a6af72 SHA-1: 3752e982aa92c448fec269f71a6a1e77fb045cba SHA-256: bed358c0fc055899a6ebe55b0599be47cacd1051b37764d211f0a421358b11bf
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs that redirect to a known malicious domain, identified by heuristics as a redirector for phishing or malware. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Volvo penta manual start'. No scripts were extracted, but the presence of malicious redirector links strongly suggests an intent to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=volvo+penta+manual+start In PDF document text
    • https://xezuzevujuniz.weebly.com/uploads/1/3/4/5/134586082/mabovuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f93d7d1eca62.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/fipet_dekomejuw_vijurom_zoxojulevesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f90e0c405261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f89c2a2827ab.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5f9ac918784be.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/pibabopuduj/hermy_the_wormy_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/jorge_basadre_historia_de_la_republica_del_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/12059522741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7248/1190/files/dutch_city_crossword_4_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/vuludixasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2991/2488/files/82983632326.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_off00003ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FF6 4988 bytes
SHA-256: ae2a65fb437a8eded1b5573b5ec7b52c19a52a3f6c22997a8c9e585013047094
font_01_sfnt_off000050da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DA 8564 bytes
SHA-256: ec526031bf24cfe905aa5ff748fe4947296a84c8d98dbc79fa8110ccce62a200

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