Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97ebf5905895e12…

MALICIOUS

PDF

86.2 KB Created: 2021-08-12 03:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 210818e46040e1d7d261b3c44d36e4c1 SHA-1: 57617f830e12871eb647d03ffc4a3af18a476b54 SHA-256: b97ebf5905895e125f4a83b537c6e4503f9e035cab646b458270ec5e5879f87f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/73adcaaef41ef41f5bfc34e0680f9a3c/sabudurirekoromuxinoretig.pdf
    • http://ray-king67reunion.com/clients/41562/File/90845471975.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/ruzopifedijixozatabatazi.pdf
    • http://tgtech-auto.com/userfiles/file/relidupelinagut.pdf
    • http://adams-gold.ru/archive/image/file/mubareragedutudid.pdf
    • http://sonsuadogo.org/Images_upload/files/40331145566.pdf
    • http://24cvety.ru/upload/files/nizawasu.pdf
    • http://coyada.com/up_images/up_images/18623983044.pdf
    • http://dok-vo.ru/userfiles/file/6948504434.pdf
    • https://agape4u.org/userfiles/file/29768839451.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c2e70ecf6---kubimoxotojufuxofuvapamap.pdf
    • http://high-keenltd.com/userfiles/file/84883925280.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608deaa58ce95---muvabaxowozavuw.pdf
    • https://pasifikendustriyel.com/userfiles/file/10057331663.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4172798b56---8696048569.pdf
    • http://lucavolpicella.it/userfiles/files/fodow.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a886257d9f7---86097068976.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/2rb2td15uv6940j9vpv04d645f/jasemiwimevup.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4754615f---16247553390.pdf
    • https://fruitssupplier.com/app/webroot/img/files/benutenegaxozazajipusipap.pdf
    • http://greenbrier101.com/userimages/tejaxawiveluxisex.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16073729293dc2---68337967548.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/82561471453.pdf
    • https://castel.ro/userfiles/file/mowofaki.pdf
    • http://ytlcases.com/userfiles/file/43342310644.pdf
    • http://email-database.info/userfiles/file/zuxawobawivejox.pdf
    • http://sola-brothers.com/userfiles/file/33313723795.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=basit+harmonik+hareket+%C3%A7%C4%B1km%C4%B1%C5%9F+sorular+%C3%B6sym
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e736.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 16792 bytes
font_01_sfnt_off0000ff48.bin
61d61943638908e148701858c9a6d40ba7a8161bf648895507135a92392b4509
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 18928 bytes
font_02_sfnt_off00012d6a.bin
cff72162b52a8e6b3abb1eafed539f1d79281c9b03e47f9ed2e5faf2a21f70a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6A 11432 bytes