Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f7adc93bdb7c9a…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 02:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8dcb4ba4e2061728490e65fd1734c033 SHA-1: a5e858b2fa00fa9e18ebb9a1a7d9d8b6b988d0d1 SHA-256: a0f7adc93bdb7c9a5722768109c8cbd0a56fb999348f7a0c9b5a9f88f56624c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://infrive.ru/uplcv?utm_term=barbie+coloring+pages+printable+pdf PDF link annotation
    • http://fazekaskozpont.hu/images/upload/file/23151342232.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/211f3b147a9e3ff00338ef3c876c6cda/newudapisebaweselemiru.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cb63851f293---tirizarusikibutura.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/92827124671.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/namgll2rofs4vg77gtb57b0uo9/xikopobaduvukemoju.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/bbe3c9870c6ccdb8649f9fbbef11d25d/89788069076.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5911ead913---kobekikatugosam.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/o0no5mm726ciio2fpcgte2b447/kepodivaruzukitudogix.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/eae5945da14e397517b111bd4a83d934.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210717_120712.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/t0dfoh0coh6brvocopna7bs0em/wumisekemubalevodeji.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/80338a68102f12c497ddef4f915e0b56/90160699269.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160df1c89a106a---lujowumogijapofofa.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70186a5cc5---38417341165.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076a74763ba1---gozumox.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f21b87b84c---remuna.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/zifurusalad.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/70642969164.pdfIn PDF document text
    • http://dhf-china.com/d/files/27849035471.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/89122523366.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/50870510540.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/67809857743.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/57e619ecc7dbceddfe6b87e033d66a62/36858177805.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/66444934797.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/regutozidalosadera.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AF 16104 bytes
SHA-256: 94c7bb8080a24bc4e6c691486c09ae553d94f12f93754800d499b85725bf6c0f
font_01_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 10988 bytes
SHA-256: a2b941df64d8e867f436894ff5ffad219d88e2d1c339241ee12c3717725c0e19
font_02_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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