Malicious PDF — malware analysis report

Static analysis result for SHA-256 d651a3002d73d1ab…

MALICIOUS

PDF

88.9 KB Created: 2021-09-03 20:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afbe2c1c30c8d9c31abc70c9ac6830d9 SHA-1: 57ff329f64896f27e0fb1a94f08a906760682fbe SHA-256: d651a3002d73d1abb056738e706e46bf2336d22642fc4199677b8e69e8395e79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and a link farm indicates a likely spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a923e2e82---65673766548.pdf
    • http://powerfalcon.net/uppic/files/gixivelo.pdf
    • http://esenkardeslerinsaat.com/resimlerfiles/14066323429.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609854e03efab---80034895760.pdf
    • http://www.nagsa.es/ckfinder/userfiles/files/nokilaxobag.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/jc54iuul1o20adnaipj72i88t4/gajawojumemesudulirulila.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fbd944b843ecc8c51316c429eacf67ff/16790668473.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607902088ec0d---43989208357.pdf
    • https://detskeihriska.eu/ckfinder/userfiles/files/12002422805.pdf
    • http://agroanaliz.by/upload/editor/files/32963902053.pdf
    • http://f-okinawa.com/img/tmp/file/xoveximidetag.pdf
    • http://studiocalderini.it/userfiles/files/81499098928.pdf
    • http://2478.ru/admin/ckfinder/userfiles/files/71772446223.pdf
    • https://luyenthitoeic.info/userfiles/file/74628406057.pdf
    • http://maternites-catholiques.org/ressource/site-image/files/50200230103.pdf
    • https://workinhotel.com/upload/fckfile/15920491465.pdf
    • http://csc-020.com/userfiles/file/20210728130944_3n1s2j.pdf
    • http://sibmaxi.ru/userfiles/file/89477898222.pdf
    • https://vicareyou.com/userfiles/file/48149796376.pdf
    • http://airsoft1.ro/files/file/96397988274.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a847f263444---10349614223.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/cc10fccae9de221935163a46deab5122/26474324130.pdf
    • http://esipro.fr/userfiles/file/zukuvamitu.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/5cd1019d3afd16d962645688b33a1f19/pazedapotunisakurapinap.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=merchant+of+venice+act+2+summary+pdf
    • 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_off0000f4e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 16792 bytes
font_01_sfnt_off00010cf9.bin
7e76cfecf888920d34d56ee14a54a646488befbf4fcf594861cb416cb36fee98
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF9 11232 bytes
font_02_sfnt_off0001273b.bin
82576818939871395d4f62610ceec6bd598d6dfc1e8b4fa89ee4ee36f556e14f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 18148 bytes