Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbea92dfc0ebeead…

MALICIOUS

PDF

83.7 KB Created: 2021-03-24 17:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76663494b240323f7539b13069c8c8a5 SHA-1: c125e3f5de57c00cd45f20714266fc9e8c8157d7 SHA-256: cbea92dfc0ebeeaddfc504cac9c76abf609f0f2299fc4c9ceb6693092d6f0829
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, indicating a link farm or SEO spamming technique. The primary URL, https://xajibur.ru/award?keyword=saga+memento+mori+pdf, suggests a lure for users searching for specific content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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
  • 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://xajibur.ru/award?keyword=saga+memento+mori+pdf
    • https://fimopoki.weebly.com/uploads/1/3/4/0/134040487/8209656.pdf
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/jivikivenafebud.pdf
    • https://wumetitazidizo.weebly.com/uploads/1/3/4/8/134885052/5704896.pdf
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/sositivid-fipisux-gevigesuronevir.pdf
    • https://javubabajekav.weebly.com/uploads/1/3/5/9/135957287/kimezedotiseb.pdf
    • https://dusalunefawotof.weebly.com/uploads/1/3/4/4/134487283/4374323.pdf
    • https://figokafudifugi.weebly.com/uploads/1/3/1/3/131383964/nukajuw-voxilodavij.pdf
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/beponal-borawitoje-pivarinub.pdf
    • http://sesopuligu.iblogger.org/mma_strawweight_fights.pdf
    • http://bafujoresepivi.iblogger.org/8114796755.pdf
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/ramopegutawelarezutu.pdf
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/fiwaxowalavatofebaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_74155a992aa54e83b501430922ea1fe8.pdf?index=true
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_a11a36384a144cbd9ddbec3676493e2d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a4302e2-27a2-4726-9762-2af59aea31ca/food_web_free_printable.pdf
    • http://velikuwuso.rf.gd/13344544907.pdf
    • https://uploads.strikinglycdn.com/files/74c21051-5ea3-4a5b-a6a8-19fb4226d0f0/hunter_fan_remote_light_switch_not_working.pdf
    • http://jigiwema.epizy.com/31740630654.pdf
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_12d0631a06044d23932872d1a9450590.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ebf299b-cae8-44b1-84a4-3be3c880d686/financial_peace_university_app_review.pdf
    • http://rifezovepon.rf.gd/61559088723.pdf
    • https://uploads.strikinglycdn.com/files/10671806-8230-45b3-b10d-cd49a12589e8/how_to_graph_velocity_from_position_time_graph.pdf
    • https://uploads.strikinglycdn.com/files/63f8cfe6-ee5f-4bfb-8e35-477b284b4baf/junudu.pdf
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_fac1462a56e4407cab30c3a6cebd884e.pdf?index=true
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_f8c2355fcb9f406686d5d0de243f7cce.pdf?index=true
    • 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_off0000f09c.bin
713da29c1281a8e9503af145784cd6a59423a2d0fb75456c272570924bbe7bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 5252 bytes
font_01_sfnt_off00010262.bin
c1d38f41cebaf2068f6898124a62605e15fb9d5a86388f901ebf9eda6688ae7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 12316 bytes
font_02_sfnt_off00012a33.bin
b084a316a77e442cefcc240ce4bb212a988685a7c6d772f0be50c12696809405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A33 16252 bytes

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