Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae9e5a258215470…

MALICIOUS

PDF

79.4 KB Created: 2021-09-12 14:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be03fd387ac92c5d9f3f40c62a7934dc SHA-1: 50a989672a081d1e897658b0c09c4c9f6d0b5faf SHA-256: aae9e5a258215470446f69714c25069b9a78ec6ea996888dbb8f8db0aed6c1ab
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The presence of a raw IP address in one of the URIs further suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://sukaunited4d.vip/contents/files/talele.pdf In PDF document text
    • http://ijdssymposium.eu/upload/lowesijezozijabobugotewoj.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/wojudududozix.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/gamosovubale.pdfIn PDF document text
    • https://ptogel2.com/contents/files/16716164375.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/jevefizunowigir.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da8c668043---boziruxunakozenovumobir.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/wodotokujefo.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/jelif.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613415a56dfba---vivetozisetilodevidigo.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/babexaluxutepokes.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/rojojakutabimag.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/88788616726.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/zoguwafotegelezojebiz.pdfPDF link annotation
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d5c9a7af12e8aede0d9859fd8f1ec294/72766955455.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/10849760283.pdfIn PDF document text
    • http://liily.jp/upload/file/20210902081432.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/rokepuxilorububawa.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/tinezumifot.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613511412b95e---75429908048.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/juvutosefana.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/e27602581a103ea22a12d197a20f347e/35471148659.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161382d9af1852---79906440217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=resident+evil+5+shield+tv+apkPDF 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_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 10608 bytes
SHA-256: cdc90754969c88fa54796c3255be03c048cfc733dee9118d70ec9d1b333f9dac
font_01_sfnt_off0000e69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69A 18952 bytes
SHA-256: 343eba1152331bfc2e4996c64aaa22b397a7051374f8f10c2f637f3d16a6d0e6
font_02_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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