Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ea5a88d78260ab…

MALICIOUS

PDF

85.7 KB Created: 2021-09-07 04:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fff141b0128d390d0e74e03c1048523a SHA-1: 278bccf34e8dca72b4d8772f8b9ed73f9ac4ae57 SHA-256: 39ea5a88d78260aba9b34e2540348a98b40ed62607fa075197670bef1f90050d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and link farm heuristics strongly indicate its purpose is to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pokemom2.com/uploads/files/rirofijamifopusibebasuti.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a92e1c31fe50d9415ac87bb61d7bb287/juwikenogudomas.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/32787238720.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104302323405030.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/81738292783.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a4a9508c5---wubemaravisajikibimimubiv.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/gogogajovelinos.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/89304734854.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd7f6cc9e1---51122249703.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16072fdd43365a---lolesas.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/47924961457.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/71892912684.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/rasajifikejotokinoz.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/77373746767.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/48189183610.pdfIn PDF document text
    • http://envigest.cz/upload/file/48347923591.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0eaa30210---85403266872.pdfIn PDF document text
    • http://hargrovefamilyreunions.com/clients/16272/File/folaketobewasorom.pdfIn PDF document text
    • https://vestol.bg/files/file/warunumi.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/98385237665.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/sevafe.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/98591505059.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/avfkli15b5nbklsollkhs95jr2/gumafebazazij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=free+cursive+handwriting+practice+worksheets+ks2PDF 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_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 11188 bytes
SHA-256: 727f38c169a90646424414dbdc8b0f2fc21d53f9544ad158957e31a4f4684663
font_01_sfnt_off00010542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D54 16904 bytes
SHA-256: 84f65bd9623ec02210e7768951496c5382eca06aec65ffcfd3b5486aa250010f

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