Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ee2049b7a3940e…

MALICIOUS

PDF

87.4 KB Created: 2021-03-23 21:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b672c66b35f1ca2c5f208ff0917bfc79 SHA-1: a924a51220c7b3944ae2a64750a9a8babe8b921f SHA-256: 43ee2049b7a3940e303c3bb63af942effad5f3074406406e87f65f9035a26a87
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, many of which point to domains associated with link farms or potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the PDF structure suggest an attempt to drive traffic to external sites, likely for phishing or SEO spam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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://pelibifir.ru/award?keyword=gina+guidelines+for+pediatric+asthma+2020+pdf PDF link annotation
    • https://netokuwusava.weebly.com/uploads/1/3/4/3/134384506/5a9d973d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fea386233d97.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/d8083fbf6.pdfIn PDF document text
    • https://minikugonon.weebly.com/uploads/1/3/4/5/134500064/6d4638e10e1e.pdfIn PDF document text
    • https://pujowuvorokom.weebly.com/uploads/1/3/5/3/135347933/2660331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482849/normal_604b508c37ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_602c51f9622d1.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/029d33c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5fd9bf57c479f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eeff404e-5492-4914-a1d7-e39d1f35e6b2.filesusr.com/ugd/e58d70_2bb822615dc54ed9bcc563c87a3d8c1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/2008_cayenne_gts_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/how_to_hard_reset_maytag_bravos_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/dune_board_game_expansion_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/movies_counter_app_free.pdfIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_625a36635b66499983346c0d2e8a32bf.pdf?index=trueIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_3c9a88af9b104cf7aafa521bc7742bfb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/worevenubegu.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/civilization_3_guide_beginner.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_cf0a07ad962a45c9b19fd7a0fbbd707a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/20068111925.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_ca647ac7dff74fc7b8e9cf0cb311483e.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_35e74399aeeb4859895c4a0a3d2eb419.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_d41ca2848ddb4d0a80d46f5810f36406.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_off00011632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11632 5872 bytes
SHA-256: b6c3a992b8fa64efe0f557d2fe9851d05be65a8aafd54bb13c931d6126059c37
font_01_sfnt_off00012a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A11 11092 bytes
SHA-256: 1aeba9a4197dbc7bd4bd41edd9f45bfa52694d11f226f29ec0e05031be7b87b3

Open this report in the interactive analyzer, or submit your own file for analysis.