Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c708f30af5af369…

MALICIOUS

PDF

74.8 KB Created: 2021-01-03 22:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 16bc854dd3f36bfac9cff8490225bd99 SHA-1: 177a7cbc32ec10fbfab1a4f3835397f0183c01b8 SHA-256: 4c708f30af5af3693d7da1631562ed3609ad85ce91a42249316ccfdc230205a1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector, specifically designed for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Minecraft trapped chest not working', suggesting a lure to entice users to click the embedded malicious link. The primary IOC is the redirector URL, which is known to lead to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=minecraft+trapped+chest+not+working In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426819/normal_5fe1d28c4b53d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5fe5ea4337232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5fda7522e7d3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5fd63598da368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389085/normal_5fec05197ab95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5fd048263b198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448113/normal_5fcc7b94a1a0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f9439e158550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495254/normal_5fd1db2f71408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462993/normal_5fd3ac1b2d28f.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/mexijegedakol/guideline_central_app.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/14818813256.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/12858136676.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/nufisorurig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc197ec-d6bf-45ce-bb88-7df552cbf149/star_wars_storyboards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f87f1c-dac5-4317-9e1b-263c1e22af62/mafadogoselebire.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/mental_arithmetic_test_and_answers.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_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 5544 bytes
SHA-256: 2aacf8dec0e7b3c7e539307c62364041487e3e8fae8a153af130426223b87482
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 11092 bytes
SHA-256: 69ef3afcac069d929b0df0fa01125732c5f65ca59924f19130f3362821141fc7

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