Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0101405b3595d3…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 20:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e7293be971e4335f7c5ec8977870ebe0 SHA-1: 732a53df1b29ef15dc09665fcecf3943fc93c8a4 SHA-256: bb0101405b3595d316755654f60b2e8b698858d4409dfc7d7e837da6d79cdbda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the numerous external URIs and link farm heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://synerhu.ru/uplcv?utm_term=pecos+national+historical+park PDF link annotation
    • http://asfalon.com/__files/file/watumofago.pdfIn PDF document text
    • http://sushi-belovo.ru/files/fopenawumi.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed464f9ab---jopipaponegekekek.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/75754730072.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/13801568767.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/0db5e5eb27eb1cc244b52cdfcff34750/sazifopexunodusase.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/taf4gkgcl1ricmm4evu33830q6/pigajirufifejuvolevexen.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/93019736429.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/22059489451.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/mihnamtn9r0a5989do8tbauem1/7609787980.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/10445440456.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/9510954e02271c0168ecc5992cde169a/nawunubukiniremorumoto.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/toard3esp7010kqduon5arkck3/88223768362.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/tajurajirerapuma.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/020159258376.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608636e854f29---2008128147.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/fixur.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/xumikuni.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/woligipaxurefuposoletob.pdfIn PDF document text
    • http://omni-links.com/famekidurezaxufopijuzunog.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c21970d962dcd1b070f10fd2bbdde003/86636062723.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/54346643046.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/wabofomimijugijixifetuboz.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_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 17628 bytes
SHA-256: 003deb0be6834049fd61284fe69d77576f14dd44b1d12e366206cc43bf315c52
font_01_sfnt_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 10564 bytes
SHA-256: a9930deb2b7b22f5e7467441c0c92e1aa1f9c1b4d074f57a3b16ac6bf9cc4370

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