Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e10d52d4651f5e4…

MALICIOUS

PDF

84.7 KB Created: 2021-07-16 20:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 17f015254c70a438fa118842984dde06 SHA-1: f4ce1c09a362c605a9215fb67b7b4bf8a9a3e133 SHA-256: 7e10d52d4651f5e4763202a078aae3705a655e8e6716ecae9e5b02f25715f104
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. While no scripts were directly extracted, the nature of the links and the detection names imply a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073572a5f725---30234866478.pdf In PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/4be6b94d1fc62a2cbccb49b898c62fb1/puxedizigurotoserafujem.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6337d4ea7bab0d2c6be6d10b1e132f9a/70072493986.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4545ca4e1---dixexigamurudojevolad.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/74346715625.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/mididiwizizolimomu.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/70696954474.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/14237785913.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/3e31a0bb34cb96f49c95caa49a3270fc/vimuwe.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1625533565.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/pezexi.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160957dec3dc5d---lakib.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/90360003771.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2cb2755ee5d654f835d773f42f65748b/44960905525.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16071a3f69f152---xepebakitubepumelisolaro.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/xotezixugofudori.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/8141c08b48e8cd1be723a4c5bf13cc43/sezopekexu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858b65a506d---18560443972.pdfIn PDF document text
    • https://arerp.kr/data/file///fowenobumosedegi.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/fafupatitefa.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/86799390173.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd6741e5b6---93799711481.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e08ba9e21---36392336497.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/17457263375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=town+hall+13+farming+base+linkPDF link annotation
    • 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_off0000e446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 17320 bytes
SHA-256: 19288475c122a58de2808555c78713dc3befa7b11ca9389854bbb76f7d2fab2c
font_01_sfnt_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 11068 bytes
SHA-256: 2aadcc781ec9508a12ac8904a2da8f44dd51f5f888162d3e682bfdf4ac6d0a1f
font_02_sfnt_off00012b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1