Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b34e632c937d4c…

MALICIOUS

PDF

68.9 KB Created: 2020-12-11 01:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 41ca79cb2ba337d435041049a2e2f70e SHA-1: c5fbf2eb3c554e3ffc1975e9f9efe39bb4158cb5 SHA-256: 56b34e632c937d4ca3d1f56c88d8ac4868d27116346e4545be62f7b5a8477c41
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Specialized hardrock bike price', suggesting a lure. The presence of numerous external links, many pointing to benign sources but one to a malicious redirector, indicates a link farm or SEO poisoning tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/123?utm_term=specialized+hardrock+bike+price In PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/fea2db9a7450dc4.pdfIn PDF document text
    • https://newewakezodem.weebly.com/uploads/1/3/4/6/134680802/3aa5e15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc12710abaecd331823d431/t/5fc2a6497acac6192a17589a/1606592074600/semiotics_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/95784072228.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/vawibifikegafiteraluj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5064cb3e0f5771460be6/1606373476574/chinese_umbrella_history.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/minecraft.net_login_page.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/jezitusukagavubunimosiror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e7908f-69d4-44f2-96d5-29a6e38cc0ed/8665229144.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc643e92cf09257bd8febc5/t/5fcab5c2980ea222adc73414/1607120322155/upgraded_brain_octane_oil_del_brand_bulletproof.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 5340 bytes
SHA-256: 74e176374eef745a29ba613bc4e002891fdd05778ef6352d1d6ac5b8908d6640
font_01_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 11312 bytes
SHA-256: b13ca3cd391654405aaef7b55426ffb5fa59dbcabc26149de95c22c5f3f5c97e

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