Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd0fb74a235f3e7…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 21:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f55de24698c6ee77cbd1214ebf4c0946 SHA-1: 983d88cbfc2076fbee713b68798f6f519992a14d SHA-256: 2bd0fb74a235f3e7eb028dbe48f5aea88e3d17d4b5014d090ced89f33e7471b8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://fokemale.ru/wix?keyword=the+unwanteds+pdf PDF link annotation
    • https://pejizaki.weebly.com/uploads/1/3/1/4/131437091/fdad423eabec51e.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/critical_thinking_skills_meaning.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/77490493394.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/ibSaCij/sunaluxoluvadar.pdfIn PDF document text
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/7148907.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/gjihsgg/viking_wars_apk.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/acer_aspire_one_722_laptop_price.pdfIn PDF document text
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/ribolutapujubi.pdfIn PDF document text
    • https://cdn.sqhk.co/tupulezi/ZheRjcD/tiny_sugar_attacker_daily_themed_crossword.pdfIn PDF document text
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/duzinep.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/791612a2-7ddd-489e-a6a3-e592cb654a7a/luzokoxapej.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/68485847528.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_70db23bcfc0d4dc2803e67ab84bd5fdc.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_7be82eda36934774b0fd57d97f464c83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/kaduxirivid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d887068-e9ab-4de0-a51c-65adebeb0c0d/2002_ford_explorer_factory_rims_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/79346773784.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_13ead6e9f1a54608a311769a5d53001d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/accident_incident_near_miss_reporting_procedure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1894b1-392a-41b3-81ad-5cc59682971c/55419898477.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_716f6f996d124ab68dd2a65cb81fc60b.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_off0000f641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF641 5040 bytes
SHA-256: 2376d332bb3255835c1511fb7e9cb42eba2dabc666c9ec39e670b877f71697a1
font_01_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 11344 bytes
SHA-256: c26aa260d3db9158c483ab311de4341969ead95b5de40fcd2d8e5a2d928bdfba