Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1272e1aeabb5e9a…

MALICIOUS

PDF

84.9 KB Created: 2021-08-17 20:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d90c825bd76f0d2e37fe8b0669d6fc17 SHA-1: 97317046dad1a1b543df8bbaf3117649ac24f914 SHA-256: f1272e1aeabb5e9ac1964b75f4cb364a4ebc008c1acb79deb8d95eafe6d976e8
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 https://synerhu.ru/uplcv?utm_term=el+velero+digital+oraciones+subordinadas+adjetivas+sustantivadas PDF link annotation
    • http://www.gonouvellezelande.com/files/kozobunapexifiz.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607713a47dfb2---xojajetit.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc518bl3enksfn8qmg324aqbqh/49620014356.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/54361437941.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/p4ukg99d41g59er0mauo28u82u/53982792604.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/62459527710.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/c5r6fmst56cbeir608h7ulh4dg/zutikajejepode.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/maxefonuwamejosuvapare.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/fijejedozesoba.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5c767b55---rarav.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/105852e45eadd040d4c9abcf68719907/rodusofejewid.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/g3gknqf47eu8gahio36ln3mbb0/36929591514.pdfIn PDF document text
    • https://baongochoa.com/upload/file/99673650577.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/duno3u5651gison2q4tlg71b01/sarujag.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/16041953850.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/1293773116.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/remejewakaxi.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821c88cf28f---ravatufafapukidovopek.pdfIn PDF document text
    • http://landpas.pl/upload/file/68591602331.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16105a2ba9d28f---nerekefaderitaxerabutodof.pdfIn PDF document text
    • https://chptravel.ir/data/file/jigidalumo.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4f009401e---fisudofapejoba.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16288800734570.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/99635491999.pdfIn PDF document text
    • https://campermagazine.tv/public/file/puzopagubabomirisexu.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/86282840322.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/23657588326.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_off0000e42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 10964 bytes
SHA-256: 2daae9eb8dc321dbec63a1c939a6972bf5519feeee8471644fc5750ec72292c2
font_01_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001158f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 18532 bytes
SHA-256: 1375e0ce299c73dc01a7735ff5a94c9b58f1805b69e2dcaf593d58ac2e2e1da8

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