Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be9f32564cb6392…

MALICIOUS

PDF

79.5 KB Created: 2021-03-26 08:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cfe7942545c0bd9baaf80acaaab7eaf1 SHA-1: 9bcefd3185099fc0b52dc0d0863a180aa222801e SHA-256: 9be9f32564cb63923fe2a0601f57ff4a05eb50f2b9e58caa1922c8fae01bdab9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though partially garbled, includes a search query related to "Game of Thrones book set price in India", indicating a lure to attract clicks. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=game+of+thrones+book+set+price+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454054/normal_6011fa9d41877.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/bd9ddad6b9f76d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_60074edca6b8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422877/normal_600121e2892f5.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/refaxat-sunapikakubov-toresubu.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/mamojum.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/wozogivivegozeniso.pdfIn PDF document text
    • https://rexanofodifedow.weebly.com/uploads/1/3/1/3/131378899/9d1fea7a5d8012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464525/normal_5febfffc15918.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/boxing_star_mod_apk_1._4_0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f0a53f-613c-4cfc-a1a7-558af0675bdb/sexoxelazabageno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abde2d91-74ca-4e37-a237-ff1745aa5626/health_and_safety_rules_for_building_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d3f5b9-06c2-4fd8-81f5-238815364575/janajepabeti.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_faf8c210281e446ea1dbf310dea600d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e7abd0-7361-4924-80f3-d7bfc2ad4e78/44729995226.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_54e708ef1aab41de80e04087e249bbac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/526ea1bb-ddeb-4bd8-a2dd-6fe30bfe538a/nipope.pdfIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_138259b79478427e977ee64c1b369bb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widetunipet/business_mathematics_and_statistics_mcqs.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_2d2e8fc3381642a6a4252292dac8675e.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_8da9dbf0ee8248c79095f68e50d649a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/797063cb-421f-4a8e-bac6-0837797767f7/pharmacy_sig_codes_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3116c102-ef44-4c9d-8680-a7e454aae1bc/interactive_project_management_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/92039166450.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_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 5596 bytes
SHA-256: 97dbe93c3b1a8abdf685b3984d9a33333c814740b668ae18215bb3021b6c4465
font_01_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 10964 bytes
SHA-256: c450b23789fcfb00548c2fe0fcd857adccbc64cc34c7e47c21a3ae88ccd8d17a