Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba79776a65822d0…

MALICIOUS

PDF

106.8 KB Created: 2021-07-04 17:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 80ebb4dba58f15fb240143e66f92cc4f SHA-1: d66ffa6af94998560bf5afe4b00032454b7ef704 SHA-256: 0ba79776a65822d002f1001cefd54812df02dcd336a9559ae19406d079916436
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm with numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the ML classifier's output strongly indicate a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607faa3db1b93---libatanafe.pdf In PDF document text
    • http://vladjurnalist.ru/archive/file/14260041245.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d1314cff---mafasodepulagupalafetujo.pdfIn PDF document text
    • https://argumentua.com/i/file/wireraviwobanitisesanad.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/lavugobifezezodawo.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/64842981634.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1a60d027b---dupikolironukig.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/45670136057.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/46652803281.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be97c5e93e3---gevokejezebunon.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ceaca5230---kodobamedi.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/58268736886.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/loxafazexubuzat.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8cc9bc271---wadefer.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebf9d17c9e---rowul.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9248acbf---27157408597.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/78328744467.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/31061606623.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b01a9db6fc7---litamibixovesubowikun.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c95446616f3---vikofosuw.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1495af0f4f---dunefevulimipuxeroxudepi.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/muzesakaxetiziwujabupal.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2bbef14f2---13529530637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=school+college+girl+sexyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AD 17236 bytes
SHA-256: 6eb151a9ae83126d9a76d41c9695e15f93ddd6427c07175ba73892102700e59a
font_01_sfnt_off00016e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18685 10436 bytes
SHA-256: a52fd8945f83c9f423a5021bc1225823c4748b23c44a25925c879b32c46a2d00

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