Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c4466289377474…

MALICIOUS

PDF

76.6 KB Created: 2021-08-19 06:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 49a106dade6334390f060a502b6b2e34 SHA-1: 3404798aff1ad3a2b1153236256ba30312b87370 SHA-256: 34c446628937747482b6a58ff1bce6d58671eb1fed4c20d3c3d51bddfaa36c51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, suggesting it's not intended for user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://philabc.ru/uplcv?utm_term=atul+purohit+garba+song+mp3+download PDF link annotation
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f838b670d---tolegulow.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/88741778368.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/rezowoku.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/43127918271.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/48113787510.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/rnh4e1pbjim2d9sbcfeecm5rca/28092363058.pdfIn PDF document text
    • https://mollis.rs//files/kekifukagapegutakegirolak.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/rogoravimodokumimes.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5e093984---43308958433.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20215281245559838.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae22607aea---30090194212.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/digivugem.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3dce4e19e0b8ae905dd8f12156dcd8a6/82427193662.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/47329584968.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/44af81962e7faa916de0d834339d4875/zonugexuwemarorab.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/10700776a9c452b807922e1cb981055d/40329842383.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccedfd8f4b0---38415285842.pdfIn PDF document text
    • http://raczcsalad.hu/files/wafiriwefo.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e582e03986---31623073673.pdfIn PDF document text
    • https://parc-hotel.info/file/powovirolujulusulotezape.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/dejidozowofidawusafasizag.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/39018115151.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_off0000c69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69D 11188 bytes
SHA-256: 068e35fcfde6ebdf069c8eff113fcd2b296953472f5e39424fa30e9aa33d29b8
font_01_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 16836 bytes
SHA-256: f7c90a22a68c11151cf294d050ab903691c4fb8ecd7b4a5a3e828be354bacd15
font_02_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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