Malicious PDF — malware analysis report

Static analysis result for SHA-256 14575a2c92e6836b…

MALICIOUS

PDF

80.9 KB Created: 2021-09-07 16:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dea1ede99113c3ed3e2ad96a4bea50da SHA-1: ff38bd52b78b684579186001549115b1dba6834a SHA-256: 14575a2c92e6836ba7cd04a17e2a372598a4aef0c530503db180a134f49a66ea
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The heuristic firings indicate it's a phishing lure, potentially a callback scam, and ClamAV explicitly detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 9

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=30+day+notice+to+pay+rent+or+quit+pdf PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/udp6b3maudi7rrhk4ehbsdmak3/789133558.pdfIn PDF document text
    • http://labsshop.com/d/files/4491634801.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xerilofelunap.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/32015721408.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/gebetasanaxidoxa.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/96270249595.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/75395827573.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f15b7915a---tokupasiwofumogo.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160771d27c9af1---medemururijizabesedewo.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074f6e6e2733---99217197092.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/42943853257.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/12372558476.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210506052254362.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/fepiropafirapixolanowa.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/vekofupefilarimogawel.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ii0rppr30n0gielo41kosksat5/zugub.pdfIn PDF document text
    • http://esejsc.com/upload/files/76834930726.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/wejozirefi.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/29616024224.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/78854280951.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/37968480477.pdfIn PDF document text
    • https://successalpha.team/upload/files/vagugazewumoza.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/nafefopujinuga.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/vivotovegumadebaje.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_off0000d46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 18520 bytes
SHA-256: b21e9ea2bdcabaa05dbd0d8b20fc0e222763e823f8ab2ad22b6cb5dbea31955f
font_02_sfnt_off00011caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAF 10956 bytes
SHA-256: 4e5cbe3950b9fef29e10f4f6b1ec67fa1f67d44f248d83df965e861a0375dba5

Open this report in the interactive analyzer, or submit your own file for analysis.