Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc508b55c01352c7…

MALICIOUS

PDF

63.8 KB Created: 2021-03-20 00:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e6383918141d11b3ad90888bbbc13d4d SHA-1: c2b1e71eb50b4acaec2dc232a6f2334e4f416a04 SHA-256: cc508b55c01352c718b970235e698075d06b759e3f1babf1d2cb7e7006edbf2e
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files, which is indicative of a link farm. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and ClamAV detection as Pdf.Phishing.Trojan suggests a malicious intent, likely to manipulate search engine results or to distribute further malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its specific purpose beyond the link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8189

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
  • 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
  • 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://nipisod.ru/award?keyword=adlerian+play+therapy+pdf PDF link annotation
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    • https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/5718b6ac.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/8378645.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/vetinujulozup.pdfIn PDF document text
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/bemidimapifolobodobo.pdfIn PDF document text
    • https://fokikemapusa.weebly.com/uploads/1/3/1/3/131398543/4397544.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/lujazajusi-vazoxapi-zovijefowurozuw-rawolag.pdfIn PDF document text
    • https://favotofuti.weebly.com/uploads/1/3/1/8/131871633/e4d6371.pdfIn PDF document text
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/pojizilek.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/new_bollywood_movie_online_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c0f5c3-c1dc-469d-8c74-a185271daf7e/71569579776.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/tikakizasesobu.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/nemokugulemefelovik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630fd593-8469-4653-b4c9-f166958ddf12/msi_z97_gaming_5_code_00.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/nuzanenamopomisolijitopo.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_db9a190e161647658d98ec4b92ac1dd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04012b17-ec6d-4974-b2b7-f9d707aea189/24902364478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3f85fb-a698-4fc8-bca9-a6afe4431940/63370530481.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_b297cfc8fd714e829df7b7710927ac1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a937e41-c589-4d96-b36a-9e64fb7f2806/digital_marketing_courses_in_pune_hadapsar.pdfIn PDF document text
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    • https://uploads.strikinglycdn.com/files/6b0a9463-81c1-4969-acbc-1e5fea236998/kididelosajubew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c402ee-cb40-4adf-844a-7e0065765f49/89837193973.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_ac58c5bb96804770b30d525e05b47bfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kabisebax/home_depot_paint_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0b9346-c6e6-4074-9d89-fe2e5741c3cc/how_do_you_fix_a_battery_charger.pdfIn PDF document text

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