Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6e1780e2a76d82…

MALICIOUS

PDF

87.1 KB Created: 2021-09-10 05:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c4f81aeae1585239ca017b2c3b38b670 SHA-1: c62e564e49f8e063d4ec3063c2f0b68ae6775af6 SHA-256: cd6e1780e2a76d82ddfc1b67a6f274c0172ada9a83c98063b168aeaef1794a6a
126 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lg-palette.com/upload/files/97271754685.pdf In PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/96671871934.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/44536353376.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/nusikuxonuxunadeleb.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/51294377916.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/28602531385.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/rirus.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/bebakegobuxisodi.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/kezijewutuvojufofisugawa.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wakogalonirefemapi.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/8615242771.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/vemokujifugofinap.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/8385611236.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138487b967f7---demejuxoxeluvegugakap.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/vomikinefa.pdfIn PDF document text
    • http://allier-genealogie.org/File:/fubikameganofaselal.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a8753f86b96848f47b2761703347e47c/zoravep.pdfIn PDF document text
    • https://totounited.com/contents/files/xexumusa.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/20426397851.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/mudikob.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/74965328916.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/neporusolilup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=transgender+history+pdfPDF 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_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 10808 bytes
SHA-256: 530681cf24b90554cf0e8354a037023a4b8c54565d0fdb78698ccd3dbfc7fc95
font_01_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC2 18492 bytes
SHA-256: bf2eff8aa4b232b4c54cf0087ecff3a5e0268edf5ffa4fa615843e520979900c

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