Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e93bfa0cd008ce…

MALICIOUS

PDF

76.7 KB Created: 2021-06-13 13:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f055b6231e290a1e8891872764a1bc67 SHA-1: 2d6d1f1b32e359f925e8a6f2bc268cbf84c1e7fc SHA-256: 09e93bfa0cd008ce0cf22d59fa993895c01cafa9d964b7f7f138e71e4c48d042
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and a link farm on disposable hosting points towards an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=female+australian+shepherd+puppy
    • http://eperon-kochersberg.com/img_db/zuvikonanopogilo.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0e9781996f07ddf16c33670dd5e56ee7/rovisedir.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987f6599bcc---kixabubenibisananizifejez.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/n3erh363lq3dj2m1v8kn5f982f/nirazoteziwesasumanag.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43cea73f2---vifepoka.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160818383a6c17---26506033585.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/s3j8aqbm7a446nhedbvh0v1i50/23307770503.pdf
    • http://afghansolar.com/userfiles/file/67465678708.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/958ada2fe691f4e438f818d8efa5840c/jagozasugudosiloliwo.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607271a3abc84---zudusex.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/rpehp14qkpnp6hecd6k4raqhg1/derazinedozi.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5146868469681c150852b9ceaa164461/xudemeximas.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e95769a2bfd33c0c9d9a92da30d8447c/rewolere.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160737a7cbe602---2039558107.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cd6f3a95---99172645857.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923c3d4b931---90170368014.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/8853610e0973dd2cb49507643369675d/16366299577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee63.bin
c532d2977d8f5e90bbc0af96c6e016059bd5376ee590621511657bd891d79648		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 5256 bytes
font_01_sfnt_off0001001b.bin
a245d0835d23220643706ba0a1c366547fbb0824c32e3b98589980b13562df73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 11288 bytes

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