Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29e123024991c9c…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 21:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 57d8fbb3c4feb22edec1d0b836157157 SHA-1: e38ee4b22a55b8b7aea38222ca2f373972463a9b SHA-256: b29e123024991c9cdf7a5f9b0d7fad446d33e39df57d8744831fb68169b578d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination or to leverage SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/472c05254764c578182fd23d403600d7/84892322665.pdf In PDF document text
    • http://matsonconstruction.net/userfiles/file/2859978639.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-14/20210714050849686953.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/55198112557.pdfIn PDF document text
    • http://flirdining.com/uploads/files/ponabixejubetugibosilina.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/7fa68ff1052b852113bfb09f0532e3fb/52404730169.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/muripaxuboromobon.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c5528cd63---63096042085.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608086b6cbcee---29349992380.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/9fba392c165dd4c3c0108e7a47644bb3/guvipowapekalamajujub.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/35240870908.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d2003ecb161---vuvogojuwo.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/kukowirudomezuxil.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/vezilakejolu.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/66265475364.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/kevixemuko.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/pavimumumu.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/10785534056.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/jabeveboxeluminijanuze.pdfIn PDF document text
    • http://artospace.com/pics/file/85975468489.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813812ed0e0---xugogibe.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/53920a30746997ff506534ede44f8b32/90630245512.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ezgo+golf+cart+charger+manualPDF 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

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_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 10664 bytes
SHA-256: b9dff66cc25078c7bd4e97f0b1ee09194ab77210603795339ce3a4249ca0e1fd
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 17348 bytes
SHA-256: 18cfbc31cf355c83cbe6d49bb060bb846969f618eb8cba81b65ad007f5e8a939
font_02_sfnt_off00011f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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