Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e250c36dbb0dc7b…

MALICIOUS

PDF

78.3 KB Created: 2021-09-03 01:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e87533369c2a8264ad57ec289e9901f6 SHA-1: a1e5fcdaf57cad39ade58820ea649e5e7ba61b14 SHA-256: 9e250c36dbb0dc7bcfcff1a781bb664a1dc8a9c4840dbcd71e36d647e745601d
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=o+m%C3%A9todo+5+a+humanidade+da+humanidade+edgar+morin+pdf PDF link annotation
    • http://massimobertoarchitetto.com/userfiles/files/50815718442.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/noripisa.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160817360aa27b---65535907617.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/dufoxerisugilidedotoxo.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/4502218282.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac64a5adbcf---97486894162.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0b9329cdd---rareravizoziz.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/2645327678.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55ca652329993cff1760f6325e2ee93d/vixakedamaropuris.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/kba4cnkr5inmqmu593t4q18bsc/30818821857.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b559eb251c7---puwinisumatekederovixadu.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/dugejujuvajatovinefavafi.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/28231234017.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/f274f3c3d91655905e3fdf29d8265dbd/58156729486.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/69902803130.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/kisipe.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/nomanobisugi.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160849c1f0990d---tumerolibufiw.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/wojaxis.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/ba447263626848731ad64713bf8b5c00/18287590338.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/75962094170.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3f345e0c8---63331837626.pdfIn PDF document text
    • http://imbirimbir.ru/files/10026339597.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/d3ed5f582b99d18f6098e0cfe3cb14ad/rodepogabevajal.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ae89367f40a4735400af316a595ff413/37317454866.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_off0000c9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F4 18280 bytes
SHA-256: 95c401de6ca8559c3ba687c4f06fe5a1354b2e06cfa33d878ecad5a16651cff3
font_01_sfnt_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 11144 bytes
SHA-256: 93558a5d2ddaa819e354ba3a50f4dfd375d48fa820c61ac55b166052b9a5d5a6

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