Malicious PDF — malware analysis report

Static analysis result for SHA-256 adeb06aec61866c9…

MALICIOUS

PDF

97.3 KB Created: 2020-11-25 12:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f482b2bf815b82f0b6f21b9e118a5c9 SHA-1: 48704887d3d9ae52d88998e37508d6358a38c3eb SHA-256: adeb06aec61866c9c3389ea82dd7b6c8edc856afa9545fb0798e3b4010aff51f
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to manipulate search results or redirect users to malicious content. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further indicates a lure-based attack. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=2007+ford+ranger+maintenance+manual
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/6773190.pdf
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f8b220de7ab8.pdf
    • https://cdn-cms.f-static.net/uploads/4413838/normal_5fbb574780f80.pdf
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/bulamulup.pdf
    • https://cdn-cms.f-static.net/uploads/4459062/normal_5fbce61c515d4.pdf
    • https://mitumeme.weebly.com/uploads/1/3/4/8/134879381/40d9b.pdf
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/gupivixap_kowaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4b4b0cfa-77c8-4749-be6c-28418471fb69/paper_lamp_shades_diy.pdf
    • https://uploads.strikinglycdn.com/files/cb5bbce3-03fc-472f-8e2a-05767621cb3d/51053482431.pdf
    • https://uploads.strikinglycdn.com/files/56bfa15c-b0c8-49a7-ba3c-1fd495fe3381/25282473163.pdf
    • https://uploads.strikinglycdn.com/files/6360f33e-5fec-4450-abbe-89cf6a361ea9/vuluxonuloditi.pdf
    • https://uploads.strikinglycdn.com/files/e5e74193-20da-4606-acfd-31cd0ef71b3a/lamijivufa.pdf
    • https://uploads.strikinglycdn.com/files/0ab43154-fade-47d3-90eb-0914bb58e7a1/dekifuxemegoboxuvaxo.pdf
    • https://uploads.strikinglycdn.com/files/3caec756-fe15-44c1-a621-c5274be3ae02/advanced_ms_excel_2010_tutorial_free_download.pdf
    • https://s3.amazonaws.com/mexavofezoxi/28338653271.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001287c.bin
8458bd51c9850a45883c011a1920a325e4a7c1bea191b39ab6b95d1408ec4a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1287C 5424 bytes
font_01_sfnt_off00013ae3.bin
b2c2ea78ab37429593a4f32fa750c48babc16fbd9fc65dba684dccb197fded27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE3 12492 bytes
font_02_sfnt_off000162af.bin
60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162AF 16132 bytes

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