Malicious PDF — malware analysis report

Static analysis result for SHA-256 56afa354182bd74f…

MALICIOUS

PDF

81.5 KB Created: 2021-05-23 12:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8d89ba1b9082f8f197c2dd2f847c828b SHA-1: cf66bfcf2ea67cf81390688e5c0babe71777928b SHA-256: 56afa354182bd74f80c8e818046c07d4427dccda90c4f54c39a5432f71accf79
136 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 phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is the primary indicator of the phishing attempt, aiming to trick users into visiting a site that likely hosts further malicious content or attempts credential theft.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/strik?utm_term=carrie+a+estranha+filme+completo+dublado+1976 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5ff0be973ef63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_60410eac1ca15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_6069b538de212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_6065194ae6b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451229/normal_606439dc4d44e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_6046db379ed13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454162/normal_5fc6fd068600f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_60246c85c9034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_6057b56252233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_602d07d657a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_602f4613d0145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494440/normal_5fe56a2ccb45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458856/normal_5fd3901475692.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/rilexazejuzovep/3773901344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4eee8b-c564-4e52-8f28-6dd5d764bb6b/how_to_reset_epson_220_ink_cartridges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22a99e4-d59d-4250-b16d-f3597d461bf8/30858543259.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/zuxabedovabuvenudoguvuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 5884 bytes
SHA-256: 8d91d85bbcfa7b6535557cc1e412cd8a714a9a8405da2722cd0b7b58a4be32fa
font_01_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 2464 bytes
SHA-256: 01d89f79120567c851dea0caa5b5ee7547c8211069383f1d59f8dd00f92a958c
font_02_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 13248 bytes
SHA-256: b07a6229aa7589f14399bd6e2c8710d7042ff48aa64a94a1f1144b700add602a

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