Malicious PDF — malware analysis report

Static analysis result for SHA-256 7383d72e4cfa8576…

MALICIOUS

PDF

123.1 KB Created: 2021-07-15 18:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 618c935f91407a0259f17f717e519b5a SHA-1: 2e935d2ebe1679f0b7ee5c476825638750cf6264 SHA-256: 7383d72e4cfa85764a6cf6917322446f60025463832b9e0a40f198258c778171
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to potentially compromised websites or further malicious content. The presence of multiple external URIs and links to compromised CMS uploads suggests a phishing or redirection scheme.

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://laborke.ru/uplcv?utm_term=writing+logically+thinking+critically+7th+edition+pdf PDF link annotation
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/033ae2512bbfd8595e710576f90a9d9f/sekebojokowomajogonenotur.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/42736247950.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/61161470237.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/gke1l5vdovp2qd1opbani8s0o4/23211263026.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/annb5vabkpmmmr5u79nj23ln1j/41981345735.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/tidedaforise.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081fecdad384---3982450379.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/72158396700.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8b29b09aa---tuzapa.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/37584896158.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/78925695803.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/95183284912.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89347859736.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/aqnth4nhu58bsi3ltbfsqj71ao/jewovizugowegeta.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/bivuzakodikesomekafemu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hev2ohsc45qq77s3gmbl2nfbkh/sifewit.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/20147916371.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/10c26a1e439da6e254569f425f6ac190/dekovali.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce769d6e103---wabogalaradagijede.pdfIn PDF document text
    • http://teplospectr.ru/images/files/61292860977.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/zagapewuvuvumeputis.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16088a4a68eb5d---gozibupevu.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_off00017c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C75 18784 bytes
SHA-256: 405ed272816a5e3cf27caac05b5243e94f533649ae66b412a7642b6aa73b1e61
font_01_sfnt_off0001ada4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5BB 10980 bytes
SHA-256: 4c263ecd9d85c3fc61619240ebfcb7d315238f4a38c54ec68517c35bb9cb7290

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