Malicious PDF — malware analysis report

Static analysis result for SHA-256 0817ea3f5650ad85…

MALICIOUS

PDF

40.1 KB Created: 2020-11-06 12:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 78c49a400e1fb3678cf9f69ce3ecc31a SHA-1: e8ea7c677ce262dd248a7f74b4cf3d398c0af1fe SHA-256: 0817ea3f5650ad85ebaa8bcce9328b2838bf57e32d36b621ff1baba4d7c69421
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 point to a redirector service, which in turn leads to a URL associated with a 'Brookstone wine opener set' lure. This suggests a phishing or social engineering attack aimed at enticing users to click through to a potentially malicious site. The ML classifier also strongly indicated maliciousness.

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://traffine.ru/aws?keyword=brookstone+wine+opener+set In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8b1d7436ba7.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/sixenomowukonaj_labelo_tigigobuge.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/8464306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5f9792ff5dfd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f93099ac1794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f89c3e441c70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8ca021781d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7f7235-98e6-46c7-85da-388e07c5633e/81211284164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef48cdfa-a463-44f0-95e3-3f2e38ec0364/vagejozotusalokisuduti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278fee13-9390-45f2-82c1-8bf2d3d06bef/full_guitar_chords_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cd1387-485c-412b-841e-7b23f3809966/wipumil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ef99cc-1406-472a-b36a-5279dc9453e7/dom_musical_kobrasol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c9b65c-3667-4d2d-aabb-e99eb33e34ba/3003267668.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 5

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_off0000619a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619A 4776 bytes
SHA-256: d0f87304fab00ab56ae5c7f3014383e136c15cc541d0687154052886afd371f4
font_01_sfnt_off00007200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 9980 bytes
SHA-256: df953e60c9fb974e5ade64086a5faf338ded577b73749cbfe7317c84272f4150

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