Malicious PDF — malware analysis report

Static analysis result for SHA-256 8709a8e15f215984…

MALICIOUS

PDF

69.2 KB Created: 2021-03-16 05:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 678b17aec853e89b03326d879ac43f8f SHA-1: d75f7a55c062ebcb4798d51a876b2559954a5023 SHA-256: 8709a8e15f2159843f0496f8e6dc7c697bfeafc0305d9910a42e072de0608626
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=pennyrile+animal+clinic PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5fdd9e3cc08df.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/bhagavad_gita_in_telugu_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385421/normal_5fcf6160edcb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5fdef0c4e10dc.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/zuvevoberopibolotaluvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_603eb4c96a3a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fe3a0ce2233b.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/minomolodofiwilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fae5d37-f404-4339-ac4c-cd4e7562e47d/delolujune.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_818c8ccafe4449fc97b40427c7e5f93f.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_87cb8a6861494ddcaef334950f075962.pdf?index=trueIn PDF document text
    • http://fomepufasele.atwebpages.com/38382933305.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_1659b67df81f4cbb8f8754052fc99c86.pdf?index=trueIn PDF document text
    • http://widusop.atwebpages.com/herman_miller_aeron_chair_parts_accessories.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_871f40b5fbc5427d86592709df7ac442.pdf?index=trueIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_03b19d1f2a8f4119b7a679105caba7ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a884e5e1-597d-4273-a4c6-35c01e2cd393/siwemowadefozo.pdfIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_ebb6696eaa8947b394a6ea27e704890a.pdf?index=trueIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_cb021609e1804221b30b10cc6d31648d.pdf?index=trueIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_598694a1c60f4e2f8d975070fed2ff0d.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 4872 bytes
SHA-256: a38f792f29ac8e41226f97bca239657d690fbc2e5fc2e81f03654f568fecf6e6
font_01_sfnt_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 10916 bytes
SHA-256: 72a3fc484efbf27042a73e349197da2235e2e0d155a2d6f4eb00b9802f0b609a