Malicious PDF — malware analysis report

Static analysis result for SHA-256 410b190373225ddd…

MALICIOUS

PDF

79.6 KB Created: 2020-11-13 17:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6028a05c37bd4c15b04679c17eec2cd SHA-1: b3c3f328086728770fc2347467b5f88bc7b51ecb SHA-256: 410b190373225ddd49a40adfc848d860713dbe60a63ebec5f1b50006621dd2e9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically linked to a search term ('molly shannon snl 50'). This pattern, combined with ML and ClamAV detections, strongly suggests a phishing or scam campaign designed to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is weaponized to deliver malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/123?utm_term=molly+shannon+snl+50
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fab112f4aa6a.pdf
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/1c957b96d52.pdf
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/zujeguv-xiponofifigum.pdf
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/e250ee38c.pdf
    • https://savapavazatu.weebly.com/uploads/1/3/4/6/134677348/tunovinar_jopaxuxutana.pdf
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f8a4cc888f6f.pdf
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8744e9b8fa9.pdf
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fab3c3329b87.pdf
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/xewutulilatarulesoz.pdf
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f875da23c494.pdf
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/wufoza.pdf
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/e6d18a4774f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d3b74a5c-1ff9-4e82-a3af-efc374945e6f/buvuxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb68.bin
b41baeea1e0a878fc1419f6a1b78247517c41c14193d948db262d75dd359e803		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 4592 bytes
font_01_sfnt_off0000faf2.bin
deb532188f7ece0f7de8024779e38fcd54b125e5dca45a5440561a94e6249659		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 13108 bytes
font_02_sfnt_off0001233b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233B 4324 bytes

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