Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb70e2dc10c5d263…

MALICIOUS

PDF

84.4 KB Created: 2021-07-30 19:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d0095b741196f8779a00c26153ba148b SHA-1: c46015e9d271ce04e0915677724b4019cda0722e SHA-256: bb70e2dc10c5d2634f8578f475391a22a94344c033f81808457df22c12508a4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to various domains, some of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be redirecting users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://www.icf-plant.com/files/file/38241089554.pdf In PDF document text
    • http://miraesusan.com/ckupload/files/93191898199.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5050cbceb4---zujokuwabajivozafuw.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/83124651249.pdfIn PDF document text
    • http://sport-way.ru/img/file/14169864966.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/zodakujofuwulos.pdfIn PDF document text
    • https://kermanrooz.com/img/files/46770344830.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/jijupejawujusadujaja.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/77d4fs5lv13c5fa2tot2to3kkg/wezojogu.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f3c6578674d57edd203f0c9182a0a731/38584349152.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/90314097213.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/c54c5e8b8c847afe83c471a7cfddc33f/24033303513.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b21c7914b1---xerivifanulimetukil.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/45214194054.pdfIn PDF document text
    • https://activepymes.com/pub/file/4971565957.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/730ace8574d5b75432222f7dad51695f/pofupivisaraladopop.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/wikovixuno.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/rga5d1fshmjcm23l0rg46vih74/80185287059.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e8e011cfd---porasowujifej.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/p4hgeqvkf26qll5mj6m39p70is/ripebarugovipixikitub.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5775a0c0a9---59839955073.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/buferuvosoferakatinuwisu.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/45002803177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=stretching+and+shrinking+grade+7+math+book+answer+key+investigation+3PDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 17384 bytes
SHA-256: e27d6698990f77a9279178bf99a94027843e969928d1c88dc0b3596ce5483e39
font_01_sfnt_off00010fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD8 11564 bytes
SHA-256: f1ad96efbeaf275948d8b7b21e3a5316a899516305a9aebb89dd1a2dcdef428d
font_02_sfnt_off00012b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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