Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f26fc75cba10997…

MALICIOUS

PDF

71.6 KB Created: 2021-01-06 19:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f16ee298207edd9c59a2081d8a66573e SHA-1: b9ab5f3792f80daf296f554c93a1e85746106964 SHA-256: 9f26fc75cba10997bc7e7c98c4aeb9b9f99fbe150679d3fbdd81f0ff378fa7e7
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to contain text related to 'airline tycoon free for pc', suggesting a lure for free software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=airline+tycoon+free++for+pc In PDF document text
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/8828703.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/3c42271300ef.pdfIn PDF document text
    • https://manasuxejorodi.weebly.com/uploads/1/3/1/6/131606962/3894940.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/5d95e2d39a2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f91c922bf4f0.pdfIn PDF document text
    • https://dijibuxanizaxi.weebly.com/uploads/1/3/4/8/134859775/8190532.pdfIn PDF document text
    • https://suvosimi.weebly.com/uploads/1/3/4/6/134688706/354448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fc100daadda4.pdfIn PDF document text
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/tofonalonamido.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/93d9dd9b-565f-4e38-9487-89bf91e0caa8/my_talking_tom_2_pet_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2a2aac-fcb1-4287-9690-74ee3d2edfaa/asagai_role_in_a_raisin_in_the_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ada4931-2e0f-4669-bef3-64db0644095a/gurijunefejemosil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d9a0cd-5ebd-4f88-a9db-468016fe80f4/72135163653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8302a0ba-e78d-4b3c-b8f2-2df986897b9d/moteur_lombardini_2_cylindres_diesel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100b18af-d177-4cbc-8484-7d56f8d462c1/p_test_calc_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596e2ff1-96d1-4e3b-ac5e-4f7e8fb84a4e/47513848265.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD10 4712 bytes
SHA-256: 4fa871f4abddfabcf3f651ba554a3769672a3600bc13dd66097937b0736c44a3
font_01_sfnt_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 10688 bytes
SHA-256: c29391a57862bfadec9d4e3062ac9ab28d7639ca4cab6c5ba028773faef799cc

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