Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb3bfc170c655bc…

MALICIOUS

PDF

88.5 KB Created: 2021-08-04 04:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5fd6961d4526aa65acd2bb704e52717f SHA-1: 44b67fe872fa6679d68b25e6fabb3375f4dd7cff SHA-256: beb3bfc170c655bc7ff08d2ba81381fe0a27c2ef600905c0bc86b0a50eaacf54
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://omegapizza.net/uploads/files/44788543087.pdf In PDF document text
    • http://rrbrentacars.com/files/others/bebavolepigunezixaripen.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/naxarosizagukiba.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/nikaxiwi.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/86436321205.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8e96fefb---fixanitoni.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/o1u9ivduo9lgtpflpk54c1jr86/xupubekidukutonozojupisa.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976944efe52---dubutabawob.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/bugewikujo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cb3388091---68324912673.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/5671be3b974277f69f0e7c67c18fda09/607176983.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109b91f0f043---favozogekiwinuvax.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/fotixowedivofovap.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/mixivefabokil.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/88462437934.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/pokig.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/09b88630d002349fb72d7cc9edfddc05/49263570902.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/13539414463.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/wururojuvunegesex.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/3u7jt15lqhr1a4glvl8gen6h46/ruxasez.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/mizixugul.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/27f840433af19da86e19e8f9f424de49/97198593061.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pl61del8kp6ss27kkgpso0gcud/3894886169.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080fabbeba85---dibejipupufuwinaberafago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+amazing+panda+adventure+full+movie+onlinePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 10968 bytes
SHA-256: a8ed82dca4f615705e8efc72830b7f28ed79cc4291a5cc4560ded809630d744d
font_01_sfnt_off00010fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 17076 bytes
SHA-256: b7d1b50c2324cc168c06616f5d62f180ab7e94611d9588dbc6662f16433eac6a
font_02_sfnt_off00013be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1