Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bb1038c07b3aea…

MALICIOUS

PDF

68.5 KB Created: 2021-09-25 10:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ef24fa2ae3fae48cc7260d25a945fad5 SHA-1: 298494e89863f04e2a6e769c5f6054b97cbdcbc4 SHA-256: 97bb1038c07b3aea31cee963ae630a60d2f7b207c585d41463fb0b802d916b63
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the execution of malicious actions or redirects the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=blemish+remover+photo+editor+free+download PDF link annotation
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a84a0581a---77360816690.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161491f2216683---suxitiwuma.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/wafiri.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/59424094947.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/68477934824.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614050ba701b0---morezobukekili.pdfPDF link annotation
    • http://pitin-akutsu.com/js/upload/files/gutilibovawuritosusig.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/20664109572.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/nutuzowijijasumo.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/wesezidoxanemin.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/zelutatepu.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/kukosigipegunudetofosaze.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/tukebevududatori.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-16/20210916040538697653.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/81208202503.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/58579900493.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/86492247864.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/tuxoxumebakujoperega.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/rizomijeguvewinij.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/32954725620.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/14ebf3abebfc4f947cd271333f36691c/9815836361.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/xirujirajigogokapovi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACEC 14480 bytes
SHA-256: d668b36539d4c619faff92222227603795ba897173cffe519588e0043575734a
font_01_sfnt_off0000d161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD161 10968 bytes
SHA-256: bff31647170606deda8ece8e95d8cd80342acdd552041decdbf8a67dac927295
font_02_sfnt_off0000eab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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