Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14f080b151e758f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-26 18:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1011cd85f61b59e51d39d84ff4e368e2 SHA-1: 718cbfadae764be3f214f46e227c1b9fefea053d SHA-256: e14f080b151e758fb89dcd22b03440935c98b4bcd49ea8ceff5032881faf7dc9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to 'https://vilenefex.ru/award?keyword=archeology+books+pdf', suggesting a phishing or link-farming attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, further supporting a malicious intent to redirect users. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=archeology+books+pdf PDF link annotation
    • http://lalat.space/disorientation_guide_cambridgeipj25.pdfIn PDF document text
    • http://stylecurtains.com/pajezakekmz6lo.pdfIn PDF document text
    • http://vsspb.ru/fanotovuwovomeb0gqyc.pdfIn PDF document text
    • http://cyberlife.store/22178129800fq4zg.pdfIn PDF document text
    • http://about-central.com/86821332982wehxn.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/diy_ideas_for_adults1fu45.pdfIn PDF document text
    • http://cmbespaceclient.xyz/fadexofajalanurujunslgui.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/kitakilesa/45896712660.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_5a77ac7248714f3d850621166f67db7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatisake/christmas_addition_math_worksheets_for_first_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/blender_performant_oster_reversible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5c9e17-52cd-440f-b0d4-34110fd7e5b0/bible_quiz_application.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_ef7d440924414ca9bb96f4025a11f55c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b94617e-65c4-48ec-b5b6-843ae6d50069/43689933054.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_92486f9734d342d491e93638e1fc18ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/28572865483.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/77754686981.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/dispute_something_on_my_experian_credit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9f5b62-ffdc-47ea-a2d7-ec8d8ea158de/90699163566.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/how_do_i_become_a_cloud_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/29939173812.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_09ac4a0110404dd3bdaec894ac207064.pdf?index=trueIn PDF document text
    • https://96daf755-36ed-4ece-a185-bed8db3f70ea.filesusr.com/ugd/a95cda_bdf0c7e5378b4f6293c8db2a33aecd2b.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_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 5504 bytes
SHA-256: 5df52c1726196f202fb659a6e18c70774e2f599747fa7c1ef2ffaaba1877b569
font_01_sfnt_off000116c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C5 12148 bytes
SHA-256: 343883bae12cc2796989db48e6703ad30b615c6a04f19ec16d54da0e90a24fff

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