Malicious PDF — malware analysis report

Static analysis result for SHA-256 562532473949315c…

MALICIOUS

PDF

109.6 KB Created: 2021-09-04 14:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7da133b6ea1c723494fb2ddddbe636ff SHA-1: 45e56fb46ac9487b56697da0239c06474f5635e7 SHA-256: 562532473949315c4241ffccfb300df94370bfdc1c691953fd5ff53b509f25d7
184 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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=bissell+proheat+2x+revolution+instruction+manual PDF link annotation
    • http://trungtamdaykem.vn/Images_upload/files/vikowi.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/7c3269e38afa9a0062a1b34cd1be1e56/rufadoxid.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/4909436941.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/79786800681.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/fdfa7e764a3e1144618c9c420f40b22f/kawofalebozu.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/bazunejizurakokuneno.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/dixuvitokonokem.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ohvd394s4b1rtkvtm8t4ot7uq7/58231369421.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/koreson.pdfIn PDF document text
    • http://pk.mo/userfiles/file/62051474280.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098477d8ad5f---89066895664.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e4cc7c5c1b6fe409b6784168d99f8b18/satunepugukerokoxufojaso.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/tobesurojitolidu.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/rusifidebatamusurufobon.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/lakomopibu.pdfIn PDF document text
    • http://lawngo.net/fckfiles/81718634743.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202108281056042620.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/282hn3qoo7ur1ptplfqu48tmrd/83931445190.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/36328292616.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611a16e287e6e---surovobipexibomuzofexi.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e2e5486eb---gifirusuboreto.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/zetarupafavogoranutoz.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/vetedodirik.pdfIn PDF document text
    • 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_off0001424a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424A 19956 bytes
SHA-256: 06708b0ddb8060102a3a76dfd19e0dd61a16975ad933858c049eceebf84ca3bc
font_01_sfnt_off00017662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17662 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E79 11080 bytes
SHA-256: 784a8005a340f1e6ff89bdcceba82156bcaa797955cfe7ef70a9f3ee5b97b1ac

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