Malicious PDF — malware analysis report

Static analysis result for SHA-256 97aa7405a9570889…

MALICIOUS

PDF

93.4 KB Created: 2021-08-14 13:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 999781416b93dcbf0a472cf3ad14ddfb SHA-1: 4807a26d2b6e82598ded1a81c919876c79989f35 SHA-256: 97aa7405a957088930ebf60e6d7b31d86f2d8dcb11dcc2e31e3e8fdb627deea4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous links pointing to compromised CMS upload directories and disposable hosting further suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://oniceh.ru/uplcv?utm_term=the+amazing+spider+man+2+apk%2Bdata+mod+unlimited+coins%2Boffline PDF link annotation
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a98e93a15ff---ribise.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160777e10f2c32---6429984810.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/5j1r1bflcu0edq3dm8lcd6o7ig/rikixudidafasisifiwobekuk.pdfIn PDF document text
    • http://vizcsap.hu/files/file/piwetizupepumuwoge.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/mdj8vvdbd0ibb3lv2s6tsuia2m/gipidubiju.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/tixoperirugafe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe68557b5b---dafilalisemafenelibosex.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/d7ee11cb674cc8b2d5c6cc6b7e1be598/30613975743.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/15946157173.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1610c7f4f06b04---69439585574.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/37950121697.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/vizuxexukaxag.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e521ae17fe---86982292293.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/jobupugarakagot.pdfIn PDF document text
    • https://kuepancong.com/contents//files/31842281942.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/mubenozuvavazezalojalewe.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6d74d4b3ee94a8c218e890978eb5a1c9/48228730749.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/20gnsd2m8lukseehqcdd5fkfj0/11817711269.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c27967a1b08---7069225091.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/59947701948.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16100413897bb9---82024762508.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/95f1da9631c4158c07eff39d6261464c/95987634936.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e040a395ae9d8a3e304ad6e922d651de/50364906085.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/47209990527.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9713951711---fonevivax.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001488a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1488A 18780 bytes
SHA-256: e2b9dc96ba25de333d43f86af62fc1435b23e1be4f6dc9afb903c387eee5db0d
font_00_sfnt_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 17040 bytes
SHA-256: af276adaa7e08aa47aff0f03e9c6ea4c492cc55a050a30d8c53e7fd0bf84f676
font_02_sfnt_off00012df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF9 11400 bytes
SHA-256: bfec78bcf0316af25c6d1ced0b3a0e4668aef81fd0f3758bee1965e67f99dbea