Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a0289396fa5e3c…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 16:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fc0f0cafee647acad278a653d58987c SHA-1: 4392ab7785641f107c243814236f476ac0fa8e21 SHA-256: a5a0289396fa5e3c1732ce82229c5936a284b03b769e2f50a5c6d7f36bc2ad2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, specifically pointing to PDF files within form upload directories. This suggests a phishing or malware distribution campaign where the document acts as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077480746053---suxumofezodakevevu.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ecac8b16504---74225756084.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c9e0029f6---tufiwolotuziman.pdf
    • http://mkpstroitel.ru/upload/files/9972324657.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a77967ebf---87513915428.pdf
    • http://studiodispirito.it/userfiles/file/67826012315.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/75094060281.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8fca2ba5019074cb54738b5acc1a51b4/90254614811.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa45539c957---88762699738.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/timamekubaligebu.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bed8edc480c---kibefuwipufuranuxedex.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb8c10ede---97456463509.pdf
    • https://eternalbliss.net/file/90285753077.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/1115aa0dcd1a83e2d26fcb440c93b67f/femizin.pdf
    • https://tiklatakip.com/calisma2/files/uploads/50168647265.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773c5fa6d7d---75643301985.pdf
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/gisusafawedatepixuzafofi.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607128c4a8fa2---48218030702.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a457b7d137---13279830712.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b06c15afe14---66944333005.pdf
    • http://littlefreddieking.com/clients/65037/File/25217921270.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/893a0b79d5de6230eec14dd58ad15652/zexapiwukane.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608133c64db6b---vosukadumo.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b2c1492a9ffb024c69a7c2b2baa27eb7/melisa.pdf
    • https://bitree.com/ckfinder/userfiles/files/pufidape.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=church+letterhead+format
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb6.bin
760ea900c6d822a7a3191a2ec4898dad637ac50e0f013ba1cd00b63faca77716		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 10508 bytes
font_01_sfnt_off000107a4.bin
cbbfd6a9efe2674d16778148332915827862b26b0d4910f960f13141ed2ad6e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A4 2484 bytes
font_02_sfnt_off0001123d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 16792 bytes
font_03_sfnt_off00012a4f.bin
990bbd164436f697fa518676519d884f801ebb6228e500f8527cbe4cdb2d5d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4F 18072 bytes

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