Malicious PDF — malware analysis report

Static analysis result for SHA-256 0721e786659edbeb…

MALICIOUS

PDF

54.0 KB Created: 2020-08-27 13:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2640dffbb24663bc4258b65486f35a13 SHA-1: 6732ffd052ebae32bebc16d74d31c7e4538c5436 SHA-256: 0721e786659edbeb3e747c25b4ba89e029f9af9b60b7ea238961e3675b02f5cb
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to SEO-optimized redirectors designed to lure users with fake download offers, such as 'opel corsa workshop manual free down'. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the document's structure and embedded links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.com/pify?keyword=opel+corsa+workshop+manual+free+down In PDF document text
    • http://files.ntqgchicago.net/uploads/1/3/0/9/130969673/kemebanogiridan-fawotovizu-belimu-sebimalix.pdfIn PDF document text
    • http://pukoxal.thesecretplaceactorsstudio.com/uploads/1/3/2/6/132681946/139237f7bb6a.pdfIn PDF document text
    • http://files.studiotreen.com/uploads/1/3/1/3/131379894/xuxoje_wusexif.pdfIn PDF document text
    • http://files.meowstories.us/uploads/1/3/1/3/131380292/jorovutogemifu.pdfIn PDF document text
    • http://files.gchmg.org/uploads/1/3/0/8/130814169/toxenaxudezisazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/roblox_fortnite_dance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6869/9303/files/economia_ambiental_y_economia_ecologica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/jisegifobawavewiloj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/starbucks_employee_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/bogaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/oathbringer_chapter_summaries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/simple_bakery_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/annual_trustee_payment_report_information_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/tenusoresomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/lobamuna.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751A 5580 bytes
SHA-256: e1d9c0a000dad37ff777831e7ec3f9e9a52ac05800ea9b7d07a6618a3e433a21
font_01_sfnt_off000087f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F2 14028 bytes
SHA-256: 05c4eda86512752508564171905c59c80c5a86b721691fa094de96a29060ed50
font_02_sfnt_off0000b3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BB 16132 bytes
SHA-256: 6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028