Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3add3ad37bdf0e5…

MALICIOUS

PDF

86.3 KB Created: 2021-09-08 00:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 977a54ecfcaef47bc2d1e0a41e5e13b2 SHA-1: 8914917cf0dc6c8e4a6c9a08fe5d6f50def6438b SHA-256: b3add3ad37bdf0e56f540ead2d68d84b729ac0ead2a544993aa2beec2a59845d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall heuristic profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=massimiliano+tomba+pdf PDF link annotation
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c08cb3af---84661437656.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/1412617469d464af5e4fefd4be10bef2/vajejig.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/bixonevekuzapum.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/bf2c3ff44bdb194f589424c882acd3a5/43129117887.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4d7a85cf7b62ea3f64fe228aab45706a/69122059744.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/37021929805.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/32586750723.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/nopipenajalabekanezol.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/kupaluviroraputibivovejos.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8df719362---sipetixesanenonerijug.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/ur65erlscku49l5ucqlu41i3pa/vowitekevukere.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb5910c797---midutinanozupizagadenesif.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/20706701022.pdfIn PDF document text
    • https://sanidom.pl/img/file/pofatekatotilitowagivi.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/jetefasonusudepi.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210704154202.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/fv87vi58a9fl2rjkersrilhr80/24406622382.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/leluluxofirezeju.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899b5751c16---33369982888.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/52120337583.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/pududojijikirok.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/vilikavurofasowimabe.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_off0000e55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55A 21312 bytes
SHA-256: d9e82b64ffeadd71e60426bf1ded611dab8c14e27213b6b2772688061dee3af8
font_01_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 10560 bytes
SHA-256: c2d4472475e84b076940edc0858ba455bd25fab4c78c30151397d001d314da94

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