Malicious PDF — malware analysis report

Static analysis result for SHA-256 e595172d2d99f03e…

MALICIOUS

PDF

102.2 KB Created: 2021-09-08 01:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9850e1c563ddcecf38e5ca4b59bee69c SHA-1: dea47fd6d28c78df9c90e87d55cdf6c642cd6085 SHA-256: e595172d2d99f03e4d8fa0e5885141f83ebbd42d97b9138c55876fda324db8a8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many pointing to compromised WordPress sites, suggesting it's designed to exploit vulnerabilities or deliver malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document attempts to trick users into calling a phone number, consistent with tech support scams or callback phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://garglob.ru/uplcv?utm_term=important+of+internet+pdf PDF link annotation
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/39aa9a9d7854abd60c8cf2974e1789af/tiseduzeroputinuxuxurizam.pdfIn PDF document text
    • http://e-sportis.com/images/upload/sopobidobigijudatowu.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/41225891562.pdfIn PDF document text
    • https://medpressa.ru/files/file/64299820221.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/31136e247ecd399170cb82b47c3427d9/zunati.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/jp6i4h1sbfv97t3fvf89o38n14/lasev.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da720c8470---90255063002.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210720_0941853634E4DE78.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/loxibokixujuzuwaj.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/vemilojukurexi.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090207494821.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/21o5himc6rtm8bjim4r50o3kin/9196681286.pdfIn PDF document text
    • https://activepymes.com/pub/file/ketemeru.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/xotewitetijakademun.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/84885596066.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/61548607744.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/xolunuzux.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/joxujeworabedupar.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/842da70b2f5ef667e1f5556e46076f00/1043696382.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/70eb7c8f22452a8b91c2d2aa4e1ff069/mimosokowebexe.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b45631587fd---mepenejitixep.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/0275f195304c70e5684afdfa4bbb48f2/vaweleloneboziluroriti.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/0b1aikphkh5k8u74kpokrrp6et/84284979780.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/29616915929.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/wufomakipibiwikagazeda.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/22u1aedccdd4jrqb50bto35361/45725909552.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_off0001287c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287C 19564 bytes
SHA-256: 3dd4fa204ba3584c822dc67b499eb34bd9995c3abb48172cdb888aa70eb63907
font_01_sfnt_off00015b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17388 10396 bytes
SHA-256: a7fd78aa6773af22f1087ea9eadeb9be0aba36d5fc3d348a713e7c2863a75b47

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