Malicious PDF — malware analysis report

Static analysis result for SHA-256 86937349bd2a825e…

MALICIOUS

PDF

94.7 KB Created: 2021-08-18 01:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ec9d64252f167eb123091f27f86323ff SHA-1: f235e4584f27824aaa047b6cc34a5e938b24f66b SHA-256: 86937349bd2a825e433017454cc04fd9b3a43c47caf4235dab643ca07eeb233f
156 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 numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://coretry.ru/uplcv?utm_term=leyes+de+los+exponentes+y+radicales+ejercicios+resueltos PDF link annotation
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/cmom2qn042kmlsji4l4jr2dpj6/6825609716.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/xamobevedamamisoruwaliv.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607721a641555---memegalurisunabaraxax.pdfIn PDF document text
    • http://hotechike.com/files/files/zezisemuliropusesifaxagu.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021053117501019.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b662ec30d4---27227150812.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/69240665446.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/lb2cu2q6qlo16t6486h5pelafp/kulufefopunonuzuba.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/24797508562.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/aa2b30d4fb718e9dc978e17edb7cd20d/tarilujosiw.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/7v2r8krgre7oup6ld7lvnnv7v6/kuxojume.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/pesovewususudapovavazu.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/3fb604dfc47a49bb2cb58d6f0862a7c5/rujilazoba.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/53006992647.pdfIn PDF document text
    • http://matras-devison.com/upload/file/dilebipinaxepanewekojono.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/bapunitirasexatolar.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2457583309---39628220472.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/77583970846.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/xinetiluvubi.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/t2cold98a74lndgb2bltj023u5/44495887653.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfd9741f6---wapit.pdfIn PDF document text
    • http://jechtinger-wein.com/jechtingen/files/92594140020.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/63163691516.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210523153504.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/sugipesatofekolidewumu.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/gobakikimive.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_off00010cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 10908 bytes
SHA-256: 83f93cf821085b440438ff44be5e837e48fb5c2345369e25ede884e4f1cdf19b
font_01_sfnt_off00012651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12651 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E63 16940 bytes
SHA-256: 2b215a6676285310fed708d325f2fdb09c337320afd45406f327555890b0bf65

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