Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a7646e3772f4c9…

MALICIOUS

PDF

81.0 KB Created: 2021-03-24 12:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4139e40711ce64a0827944f9ed8e8f3f SHA-1: 3f6af6c3977f7204af3470b09f833a4fd6afdb8e SHA-256: 36a7646e3772f4c9d10cdf64521c318a492590873faffa99b88c6afd1608bbc5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by an ML classifier with high confidence and contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a 'download' button lure further supports a malicious intent to direct users to external resources. The primary URL appears to be a search query related to downloading a movie, which is a common lure for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=why+did+i+get+married+movie+download+mp4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fd092de7f001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_6030446057e48.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/jaximaduzi.pdfIn PDF document text
    • http://tetoxukipim.getenjoyment.net/porot.pdfIn PDF document text
    • https://revewodozuxun.weebly.com/uploads/1/3/1/3/131398596/6594201.pdfIn PDF document text
    • http://peuer.xyz/tm-ac1900_factory_resetgq3by.pdfIn PDF document text
    • http://limaxinsto.xyz/renonuxinaxibevibazisodudzi6l.pdfIn PDF document text
    • https://senolotazafam.weebly.com/uploads/1/3/4/5/134597296/tupuruzawam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365636/normal_5fef7fd15246e.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/kenneth_cole_watch.pdfIn PDF document text
    • http://zofugef.mypressonline.com/zoxojoponivejamutirikon.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/8615994.pdfIn PDF document text
    • http://kapusta.pro/64325429963nrogw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5ff9b21001804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/40213ee6-42fb-42a7-a1e1-f0076ef3f9c0/81006486901.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_99addf18a5c6480db110c0e863b1407a.pdf?index=trueIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_679df58b59df47e797c5c377b09d3944.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f64d725-5bc5-4dec-98d9-801356df551d/goxalofifudaxatov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ee28a7-fc51-4e11-b4b8-4a0e73bb7d0d/how_to_use_a_fighting_knife.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_c43771a647ac4d9c9fb4aded922e1fbe.pdf?index=trueIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/california_dmv_release_of_liability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea56c2ad-6186-4235-8026-062c65d70b48/guy_who_invented_pet_rock.pdfIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_57a105ae032c414990755a2c466d40b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed263b28-6b6d-4113-bec3-cbe564f69da8/how_to_live_calm_life.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 5340 bytes
SHA-256: c30b7ba1cf2b2fa16f512d49e1bececb23bae21c92f79325f564c3cc90d144cb
font_01_sfnt_off00010411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 10584 bytes
SHA-256: 2274ca8b5314c1c3ce370ea9cfc8ccdc1b1b5c7bf231cae32a002e860f68a00b
font_02_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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