Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b5d7b3258e0a48…

MALICIOUS

PDF

84.7 KB Created: 2021-02-20 11:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2299cd5a8c8da1cfba9650e403fb0762 SHA-1: 6c13a34e82800a41b27c7671f074e8b0bf45ea70 SHA-256: f6b5d7b3258e0a486f79c65940080bf046fe4b3e112dc7c172bdb33e22181be5
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=reduction+potential+table+pdf PDF link annotation
    • http://winoraama.space/damepiy7lp8.pdfIn PDF document text
    • http://daliadiago.com/97137789154sojjw.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/mematilelosuwifu.pdfIn PDF document text
    • https://wuvenenuw.weebly.com/uploads/1/3/1/3/131383928/magomigujibezan-punixi-lajebevepuw.pdfIn PDF document text
    • http://nojosomefoviw.66ghz.com/chablis_vintage_report_2018.pdfIn PDF document text
    • http://basvuruizleme.online/messenger_bag_gucci_ebayrl8p2.pdfIn PDF document text
    • http://arenda-comp.space/sarifagozotdg.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/af338e33d262d33.pdfIn PDF document text
    • http://zokorut.iblogger.org/chipset_adalah_android.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/kibavutibeved/ssc_application_form_online_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/outlast_1_viet_hoa.pdfIn PDF document text
    • http://zisibife.epizy.com/mevozis.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/dunamovajapotokixu.pdfIn PDF document text
    • http://bomajada.epizy.com/vemudilomilote.pdfIn PDF document text
    • http://volapubexu.epizy.com/bisacodyl_davis_drug.pdfIn PDF document text
    • http://kiwusegofavuto.rf.gd/56918188285.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/zurepojezodadufaruxiva.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/choctaw_nation_clothing_allowance_form.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/southern_baptist_deacon_ordination_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/conduction_convection_radiation_definition.pdfIn PDF document text
    • http://fawosafo.epizy.com/medicare_guidelines_for_bone_density_scan.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/76285165909.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/69869256335.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 2856 bytes
SHA-256: 6a7390c9e634f7f167841a75ffa617ce3f7010ba402b4c06ad0a47e5500b6a59
font_01_sfnt_off0000e74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 5020 bytes
SHA-256: 05afce084dede5af9b3d2abe323c480da276acef3a13a529a40e52c7c4836ad9
font_02_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 17100 bytes
SHA-256: 1d02bd2c986f45f6b04b0fbd7adcf44194c79fd7dafef7325333140053c22a20
font_03_sfnt_off00012d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1E 16316 bytes
SHA-256: a2d115f0f97de8ad79ff358ffc77a456361852623a062a0fc59f2585ee3261ce

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