Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2272fb3605c9bf…

MALICIOUS

PDF

72.2 KB Created: 2021-09-15 03:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a27b8752aa9921d5b2415ab0a1ece8b9 SHA-1: 3286f1dc3396b326e67fa08e053d5d158f9869c6 SHA-256: fa2272fb3605c9bfce99c988241bbc6e6947c533a275ba31a9e6595e6d692e6b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded URLs pointing to compromised WordPress sites and a link farm on disposable hosting suggests an attempt to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://queure.ru/uplcv?utm_term=how+can+i+watch+something+from+my+phone+on+tv PDF link annotation
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d119f12687---12578488658.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/tetugebol.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/zefogerekevipipumidazolu.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/bulujufewesipik.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/94141363538.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/62299749392.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109021719298449.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/89429040025.pdfIn PDF document text
    • http://artediapharma.com/upload/files/titejivavelewesubimaf.pdfIn PDF document text
    • https://shunnasato.com/69175057684.pdfIn PDF document text
    • http://xenangheli.vn/public/files/92770274940.pdfIn PDF document text
    • http://reopen911.info/media/file/tibarutoparejoxuberoreloj.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4b2b22e5033900aa39a2c3ff4d8099e4/bemokimalodavoxafogakaba.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394b781963c---8773714521.pdfIn PDF document text
    • http://kes.org/upload/editor/files/zaxurewo.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8c7cefdc3---78501390378.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/22140509643.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/wetawexaraxetuk.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/31959494613.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a6ec4d214df810de7b6803bc92f1d9a4/49616754233.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130669854a63---warulak.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ui17sqmrlehnv4b27kaf4rnep6/99602931897.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d70f6415513e3d70205e52f3057120fe/lesamuwef.pdfIn PDF document text
    • http://badgerhillfarm.uk/jaguzobo.pdfIn PDF document text
    • http://shamayachts.com/upload/file/33025713474.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 11140 bytes
SHA-256: 87e9a91e872676b455801f4d568064ad7548101d2975a3b527b4622ad1a0e71d
font_02_sfnt_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 16176 bytes
SHA-256: 070c46d3092a4d2f5ced6f58545866abbb9dd8609773b479f59e065942a5f642

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