Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f2610522e41fc6…

MALICIOUS

PDF

87.2 KB Created: 2021-09-07 05:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db13f74261f0d1216d7387279f97e8f1 SHA-1: c293d9a4e15b9c68139245cd0f8d53c537cb979a SHA-256: a7f2610522e41fc6fed094858c10b97a8fdfc894c2a00a02aa5f0d64139cef47
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, potentially leading to further malicious content or phishing attempts, and is disguised with a lure related to car repair information. While no scripts were extracted, the PDF structure and numerous embedded URLs point towards a phishing or scam campaign designed to trick users into downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e08736577c---32369277075.pdf In PDF document text
    • https://biomisszio.hu/tmp/34221680546.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/69df851cf9cb466fbed379e4f8d8ae4b/44125028652.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609412da099a2---rojuwaviwute.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/51973558398.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/tepisizekiboxalabijabe.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/fibeg.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vakugelix.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/iftjk6ov3bpq6a3evgp3otbtb7/28368357191.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///regidesaposebibodo.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/50505345976.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/13198016218.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/vofavowabibel.pdfIn PDF document text
    • http://kasargod.net/uploads/file/92608395869.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/78241026846.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/nudozofaderefid.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/4e7956d89f6cf9de9396c00c774b50da/3528401664.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb4ca91698---zijebe.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/mac9fvmtohab5tabshce9940fh/jurafelaxasi.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/zifudaponixezukasimonelum.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f3865b2bb355d1d5242acfa466636d40/54556095020.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/rapuso.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160863219ec869---7032795223.pdfIn PDF document text
    • http://agavietnam.com/img/files/34698037433.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=bmw+x5+steering+angle+sensor+replacement+pdfPDF 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_off0000eb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 11336 bytes
SHA-256: 7e806233e6b93b8768a6bc3287aa8bbe8016879601a327391093369d8db4c7a4
font_01_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF0 18668 bytes
SHA-256: a93a3960df5509c3882d430bc13e4d690e281cb95bb2d09561f04c347a9bd2e2

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