Malicious PDF — malware analysis report

Static analysis result for SHA-256 194eb56b30d3cef1…

MALICIOUS

PDF

114.0 KB Created: 2021-07-25 02:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: aca0f688eecc16213ceb8ff457c24e21 SHA-1: 9801bf125d74dd0b42c0bd7711b53a8b4f95532e SHA-256: 194eb56b30d3cef137b1d51ca015fd776fa678a13220d30b20fbfd77fb25504c
156 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 detecting it as a phishing trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to obscure the final destination. The primary attack pattern involves directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/rvrjn564u5klj1o18ks6eh2k8n/29437276186.pdf In PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d799e5b34---pusejamafogixisen.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/vudawinuxino.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a2287cee36b4e9d969eea3632547274c/46026511177.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a01b908b---30891362881.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/b14e6d105e89c3d9e599b194fb91332d/kesozaraxeka.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/11286893935.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/0llnckc1puc57l60l6u62tucj0/dodifodusoregefepe.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/6893797407.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/95191706292.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/muvegojirewibixifijo.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608925a61ed0e---gipoxajixoxa.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1084607145---36807515023.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/logixabinokowomisot.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26e1d6978e---zetosevugebixezaxexodaped.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e86fc967b8---gololirokamosenozi.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/majodo.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/0daaef5209749e9cbb14a88e4acf8506/wadiwidiresix.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/u92cs9rhdth63dfcm864ij9uc1/59355733699.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/98391884901.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/e68ejd5rvq0kegll8jsrcnav86/wigere.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/97318073748.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/200f7aed2a4f71574db36460ec820dc7/lojugesedusetazibodofiza.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/41885741373.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bed68660e03---99986600703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+big+is+a+quarter+sheet+cake+from+publixPDF link annotation
    • 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_off000154e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E0 18588 bytes
SHA-256: bae1aa9e24156db3610edea52ab3f121de3c18e8aa86c43add05b6661399ffec
font_01_sfnt_off00018637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18637 11480 bytes
SHA-256: a20af61660f76616f6c4cb6200cfc7c05599631da0774ce5d53b22f125b41be9
font_02_sfnt_off0001a0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1