Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec740a887f57ea9…

MALICIOUS

PDF

77.0 KB Created: 2021-09-16 16:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ed47a5c20daa46b261794103d0d89f60 SHA-1: 8b07eef1d64df3f7e14b0e534997d13eda5d43d9 SHA-256: aec740a887f57ea9d3e75501d267cae10edab4c9ea3ed49c2ea54d9519109efd
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links, including one that impersonates Amazon and directs users to a compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=123movies+2020+app.
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jairdefreitas.com/ckfinder/userfiles/files/paxujapokuberuzoteruwude.pdf In PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/24538783400.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/4208171718.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/97228843002.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/muzomogemukag.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/75692309077.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/zikupefanajakez.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/64421975469.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/ruwezefuniropax.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/xobip.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/megatefeviwojekajilip.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/dibepuvodi.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/94649059462.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/dageromavo.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-10/20210910005618873275.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc244a8ad8---12183801039.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210905093548746102my47j3navv6n.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/91605076069.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/933866e04e27a09d366ad878bda3f9a4/57091164015.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/kewilijab.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/benavasimuva.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210910075333.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/luzajibulezerafogimijigor.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/8af5851dcfe051e6d06315603b944240/12537814818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=123movies+2020+appPDF 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_off0000cb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB57 10500 bytes
SHA-256: 6da8209446f691ad2da2d6350b528b733ce35923ffc3c156d14eb4e830826da4
font_01_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 16612 bytes
SHA-256: 461134554c05872d94609cafe23871defba42158417c9122eb81e90c0212d993
font_02_sfnt_off00010e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.