Malicious PDF — malware analysis report

Static analysis result for SHA-256 7174ab1d290c98c3…

MALICIOUS

PDF

82.0 KB Created: 2021-09-20 13:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e2a70822f8629d474bcfddb973726999 SHA-1: 1d496dffc1be294c3451df19c98c09e26acd60f8 SHA-256: 7174ab1d290c98c39c45a4eff7685de8e53378bc413c581d2fbc514b7732096c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to potential exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=why+apps+are+not+downloading+in+play+store PDF link annotation
    • http://tt-ural.su/admin/ckfinder/userfiles/files/34840095863.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/niler.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/99963472046.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/55057498587.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/xugililirufokanen.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/17400545280.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/68113933994.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/12200909864.pdfIn PDF document text
    • https://stvietnam.net/luutru/files/kegusafateriwusojoman.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/nofokujumakagixoperi.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/wizazasagutepewuwap.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/28629500619.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/49525658c5149e1a9518e251e8082766/33522580968.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/lixodutezodono.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2h1nicknmrad5de3t9pd21jeos/94177487297.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/46993633252.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/70905942264.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/75344982077.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/6946712356.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444c6697d8c---9899434573.pdfIn PDF document text
    • http://generaldistco.com/images/file/82007229799.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/povopefivuzasaronosugivej.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/sojawotokavabewowo.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/xajokixeduforonuzitilawi.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/66448917694.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_off0000dc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0A 17432 bytes
SHA-256: f963f49d25ecf5d926aef96213dc97215e560935373f92e899b2900f88961dd8
font_01_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 10864 bytes
SHA-256: 2e8d0d4f1cdeb9b7170e4e919068b2bcd0a5fa5d4b648fad4b149c465f0508b3
font_02_sfnt_off00012200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12200 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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