Malicious PDF — malware analysis report

Static analysis result for SHA-256 61174712d13d541a…

MALICIOUS

PDF

75.6 KB Created: 2021-05-20 06:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b7d507705d25c1eed81c13978f72c6a7 SHA-1: b26882cda1525cd2e10c26d066ddc8dd7e36354e SHA-256: 61174712d13d541ae32dc000467dac4f9c2cd1f9a7d119351cbc25dc3cfb51a1
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, redirecting users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the external URL used for redirection, which is likely part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=un+manual+para+ser+ni%25C3%25B1o+gabriel+garcia+marquez PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475208/normal_6059baa8cdf73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5fe956ee2c972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_60419a58679ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_6043b2f81aad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fd111f275426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380858/normal_5fedd28a84193.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fc8508863830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_6026db6823032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/brain_death_criteria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc27d4f-0543-47f3-bded-f3ac711851ea/6106648182.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/soft_skills_powerpoint_presentations_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/rezunoxut.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/pefironoforemoduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c9c263-4ce6-4922-926c-3e6dd2521801/what_is_in_boston_market_creamed_spinach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91aa2a0-6a4c-4b0b-a96a-bc166c68e13a/67255245325.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/polk_omni_sb1_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/garixirigolutaxefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af1d364-757e-4830-8daa-b3a1fa44c6af/runivupuwirejezazizolu.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/80447398342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953500c2-366a-45ea-8593-ce48a7d424e8/how_to_write_a_summary_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/36549000095.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/15944944023.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_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 5576 bytes
SHA-256: bc9602897be01fe0f03d3ca2a369ff6c3d9f73dc14a3e8ab21e18af31bece94c
font_01_sfnt_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 11412 bytes
SHA-256: 12f51557bec9e2cb5e30fb7b87aacd66b51a32ab4345b2c919b8647f24ca3bb8
font_02_sfnt_off0001104d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.