Malicious PDF — malware analysis report

Static analysis result for SHA-256 1beb79254ee69813…

MALICIOUS

PDF

178.3 KB Created: 2021-07-07 22:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7ade7156ff3f1d7d65d1e5db458980d SHA-1: b893beb6dfdb335bbd4b80c153d3f166f7f3b07a SHA-256: 1beb79254ee69813e821a91ce1f0ab4f45917e9fcb769b277183b378bb674776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9052

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 https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/72d9d7be7359f1c2079a14503ae0c0e8/bikur.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a892a1d84c6---xuxenule.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/8f5a3080b502ad9492c3b5a429c9aca5/35306248387.pdf
    • https://poolpoint.be/uploads/file/patufexine.pdf
    • http://sbnjl.com/userfiles/files/komakuron.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/732075014ce1b67bb981b52247c5ac1a/jigewegubazew.pdf
    • http://uppercanadatwocylinderclub.com/clients/877835/File/puzago.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b36f17bc384---toribanugebejokukama.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/acntjeshq7u84uf2ae88gcd6a1/verubanakafefa.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0bbfc77ab04b1810529c00ebd3132412/xupew.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82bb48c85a7b3da1abed1b59957a2824/dadunonajixudole.pdf
    • https://abe-rdc.com/userfiles/file/biregagun.pdf
    • http://w-f-l.de/user_img/file/xovasimixixavozu.pdf
    • http://bartuceviri.com/userfiles/file/45220653198.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9f94cf078---32743605876.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609020e8b0367---pazekinijagekuvawodom.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/955dfc9508aa3056b48b536a124b436c/vexum.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb742e4d74---najigufimamevoziwebituz.pdf
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/devodenuzunibiserajejer.pdf
    • http://aceonlinementors.com/userfiles/file/25670992306.pdf
    • http://ahlhy.com/uploads/file/042229471333.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/6fe71a07f2c3b0d36de8103a235e1f09/63434898606.pdf
    • https://landbondcorten.com/attachment/file/651ae1ca9f6c245d9e61b6d80ea5c7df.pdf
    • http://gokea.org/upload/editor/files/nexejuzagigelis.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c27d2193d.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/425c70052fcd8c3b38f67168e1d8e189/povifisurakigowimuzum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+many+years+did+abraham+wait+for+isaac
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022835.bin
430612c162b1c2bb6defeb32d60e20288febb490d534adfa935528d8d7c7631f
pdf-font-stream PDF embedded font (sfnt) at offset 0x22835 26096 bytes
font_01_sfnt_off0002662b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2662B 16792 bytes
font_02_sfnt_off00027e3c.bin
b8c3aa7aebcb3262fdfc2c0027f81e832b759d8a12daaf3550aeadee059a6fe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x27E3C 19388 bytes
font_03_sfnt_off00029f4b.bin
0d414c99b38d620e7b8e644abc5398ba90686d0d773cbbd0b211388498fffc7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x29F4B 11024 bytes