Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3412835ccf22e03…

MALICIOUS

PDF

87.5 KB Created: 2021-09-22 13:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e8872290bdf27b8ef73d1f07c6df5c9c SHA-1: c8cf0c6fb66b0cc5a200b759fa3e381a4b95bb1e SHA-256: e3412835ccf22e03968f2e97ee56374e27f1824e3554c483a0f07e11b4e8e7b2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and multiple external URLs, some hosted on compromised CMS platforms. The heuristics indicate a callback phishing or tech-support scam pattern, likely using the embedded JavaScript to facilitate the lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into contacting a fraudulent support line or engaging in a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=gta+5+premium+edition+apk PDF link annotation
    • http://salespate.com/userfiles/file/xonemefebobumolusesuruda.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/zefumesawat.pdfIn PDF document text
    • https://tadimtursu.com/image/files/donijonegipazalegujusilej.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/96764667863.pdfIn PDF document text
    • https://g-stampo.com/pics/pages/file/2812143357.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0a61r530hhekd8teqbn2e0rb6s/47838198341.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/94543843137.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138e8e0285d1---novawajodelepotojipaxijug.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/16450036182.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/68133466898.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/fc513ae4b81d4c2a2354b065610c7888/65539847129.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/36610962804.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/67640075093.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/087daf4772e83244caa0a4b58fce904f/70414296128.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/33543988401.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/fikelugevofikobejizeke.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/81359746642.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142053c3c6ad---88663826104.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/vomujixiwebutetoduxi.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/wekinedip.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/xizevu.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/pukevadarexodix.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/75820696162.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/90661321577.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_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 10704 bytes
SHA-256: 2329c7099636412680f957a3f5c0b8a5631c352e470e5d16e2b27eff5695503d
font_01_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 18584 bytes
SHA-256: 35ef018e44efc6f8a7ad0c67ccdb07f779a631e2db83ba49462232b393143306
font_02_sfnt_off000137fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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