Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b7d359099732a6…

MALICIOUS

PDF

68.8 KB Created: 2021-09-18 21:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6707e6135f125c3387f3c32e16a025a5 SHA-1: ee5f7f35926dfe1cd56a373c51760eec1cd69f0d SHA-256: e7b7d359099732a6552b067c0a7378b4d0bdaa7ad24118091924c5d738d35932
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it likely presents as an image to obscure clickable elements, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=need+for+speed+payback+for+android+download PDF link annotation
    • http://jadeite.ru/images/file/34514879890.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/21456041630.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/maxamudokadaneridax.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/mepefoka.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/sobuxizibunopenapepobipox.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f6cc216d0ba397a7121c50da07c97377/25134091911.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136203958bd7---wigimilalavaxeke.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/11363383753.pdfIn PDF document text
    • http://full814.com/upload/files/94700273734.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/92903249052.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/427494e42ad14b84f82ae5226b52a161/79367177634.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/merededamezinal.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cf8f7239ba00362dc95a8246e99d22d2/22217129683.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/dowutotipanab.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/wagatuvusowezotamepevadi.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/pamunabuned.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210905235641.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/54633432230.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/mukemegalozuvutaxob.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/fiwiposugu.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/podixejegomegamunab.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f42fc1853---gekakunulugejeludi.pdfIn PDF document text
    • http://citranco.com/users/files/salesufekuvuwexenosisi.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/85734045043.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-13/20210913150419415620.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_off0000b189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB189 10924 bytes
SHA-256: a04dd8fcab1c44ab0f92aa714f0f1fe19634e6cbf6f77872a6c2fbc4314cb28e
font_01_sfnt_off0000cacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 14108 bytes
SHA-256: 4ebbd5c8e36ddd0b63e82a6a2cb356573b3d58a053b0ef6ad7acc1029921cc08