Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e44c8487105e846…

MALICIOUS

PDF

135.9 KB Created: 2021-07-14 02:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eed951dc30a6a8be08f3b92e0a3ab9fb SHA-1: ba06a8d4ce1054703bed5b78c373a36abc1352b4 SHA-256: 7e44c8487105e84614dca36bdc98e6589f7641ad4da2fedb34f90d9d7844bbf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=kingdom+of+fire+and+flesh PDF link annotation
    • http://wallsfamilyreunion.com/clients/876683/File/52403173659.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/bbe2c0c5463243abe27cab783ab7961a/50767744781.pdfIn PDF document text
    • https://chp-travel.ir/data/file/82273124580.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/waxob.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/8871f5f0f53a068678be2590d3b1e9ab/31339763142.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/975744d0e25c445943cc8dc3af10b88c/10697763723.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/37531034270.pdfIn PDF document text
    • http://www.bash.cl/media/file/lujax.pdfIn PDF document text
    • https://ms01bet.com/contents//files/68562067653.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087755ab005e---vukaradevorodigot.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/figusov.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/jawikikutulefisudubo.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6a766437---69269244992.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/musigavazesemalozakan.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962c156c0b7---kuriba.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbbf79181c---lodamopavidob.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/4caa242b6ed6523bc66f8347f368f14e/derixukegebumuxegute.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210524130254_gtbj5p.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/9a9b39a6078c786f71e49d02eb3e2ec3/50256145781.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/f7qe2g9h218demookltsuc5chk/lipoveja.pdfIn PDF document text
    • https://corghialberti.it/file/lofofoluw.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/26458512333.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f133115de6---52474421684.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_off0001af17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF17 10696 bytes
SHA-256: 16dbd461fce7918242f7b6c32878881dd93a8d04213c75dc7ede92e95e38c7bd
font_01_sfnt_off0001c71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C71B 19248 bytes
SHA-256: 2b450d1857785746792afbd57b76de83f1d40745397d1d310d0602638c601a06
font_02_sfnt_off0001f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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