Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29d1f6b08e46a3b…

MALICIOUS

PDF

111.5 KB Created: 2021-08-05 04:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6963164e6666ec3bff359b7268183f50 SHA-1: b5d63187344df853e2df99f8d3e94d4242add7d8 SHA-256: f29d1f6b08e46a3ba858a0152ede7605ab7c6165d4dda2fa3eb85eebb2ebc6ce
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=how+to+run+dolphin+emulator+smoothly+on+low+end+pc PDF link annotation
    • http://chono.mn/uploads/userfiles/files/40835291612.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/77253757450.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608803cd23eb1---vagibelurofirir.pdfPDF link annotation
    • http://dancedynamicsla.com/clients/38740/File/piwixadetixenowowajapiju.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/ac77886bbcd298cb4e691e4553edfb78/kobuzijobotawenoposi.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/59194657667.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeab773025---78232760336.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/244007aafd83ba143442a35d993466f2/daloxagime.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/lakubeses.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b826fc3c8bf---1065084886.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/xezugezumajuwitemus.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/benoxefiwepigesi.pdfIn PDF document text
    • https://viettrungson.com/media//Files/43491655676.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/d37baea54799afa384ddecc7ec9507aa/buxotinizowijutonetogab.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/7f066c003151143ac29593a5a92e3503/61869707017.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/jisoninugexovepu.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/nelop.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/zumejilamuzijejukowifel.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160928b4f360ce---17345682940.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/81480528638.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/0qa8uav2f0gdp479221ng9m832/mukotetadowexiwitog.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/bitogawinojanateleguvepev.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/80990966215.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e453764c7---53211483682.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_off000149d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000161e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161E8 11072 bytes
SHA-256: ba45d4d11fb7fc5d7190649d381701d4a3930a1d5d2dd11a644f339692a23d60
font_02_sfnt_off00017b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B84 19640 bytes
SHA-256: 792b68198569b893627f97af6a6a96e58dc0252630620a1358ba79d4949c6edb