Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7144953a2a94cd…

MALICIOUS

PDF

120.4 KB Created: 2021-07-28 02:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b49a825b631319a588ed67e1903756d4 SHA-1: b1713c715f72790daa39c2da878c187bce4deba7 SHA-256: 1e7144953a2a94cdc36d1b952743922e55d4d8a9ec7bc11d2c645ad45bf6eec1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document is part of a link farm designed to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.barbazan-debat.fr/ckfinder/userfiles/files/73918639528.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7a3383c472b9b860d5ca5d82f88f4924/fuwazuxewekajolusi.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160adae7147e16---barisu.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/98292025915.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/80307807616.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e483c8ca2f7---masulivezifizopepuwedax.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/momowizuzok.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/wojuwoloxepuvuxineluxa.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/96070330236.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7e6f2e8685---34639431607.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/figilitobarubiwuxeva.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/bevej.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/392be06d58d709f4503633c178c6122b/65679321621.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/42251016563.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab397a25f15---tinitubeziravexu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16090d306b8063---risum.pdfIn PDF document text
    • https://renetravel.ro/images/files/kivolivimifisuvenegejoru.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/83642553601.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/310d4f0fe1adc8dc218b44b1d8a2ca14/95455432136.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/f0936e54a03c3638cf71755509b72f10/suwana.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/0dd01va06pqvrher7i0p01g3p5/mosofoxedikijup.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///98123479864.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/35917221037.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608614111d572---81983974340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=weekly+sales+report+excel+templatePDF 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_off000170e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E1 19628 bytes
SHA-256: 1c598c90b4cda3c8c0a9bef546ec5f67725603d5d2ecf58fefbcb6cc0d5d7c79
font_01_sfnt_off0001a2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001babf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BABF 10640 bytes
SHA-256: d0366616ba568af62a22510fb2ae245b1566d39c0ba2898eb482dda253bafe53

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