Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab98e702a5c17db…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 04:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 244d587d48c8a56dc722e7404d669bf1 SHA-1: 9b4f7e13adbbda4e01d43a9bf8de7c91771cdfad SHA-256: bab98e702a5c17dbd8666f3c8c6fc6be555164afac2a57697743b99b5a48fe69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic specifically highlights the use of compromised upload storage for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e47d14bbe9---gomamakegimaro.pdf In PDF document text
    • http://turinhotelcompany.com/userfiles/files/82034491955.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7c7e8aa792babe0be18173876043caeb/pejunolujiper.pdfIn PDF document text
    • http://planbmedia.hu/files/90116679861.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/forin.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/wetevogepozebavo.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/da81edbe62e8308f9d42a034a8d5634f/29277577806.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca0ba523fe---rebogarilinofununakowut.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/zusomuxa.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/xenumudotemozudukizani.pdfIn PDF document text
    • https://elemonbg.com/Files/File/gonexopogafonekijilobo.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/gigurusavuv.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aca4b27f75c---35989807609.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/63119796298.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/92041563557.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/6929993330.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/wududolomazitixolumaxaw.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021832348305691.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/66fd060d11d9866ef87b0cc5b4785622/25133907825.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/92166056093.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613004b8012e3---rizori.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/f1ralq5mj7audcel45iluhukpn/jidijetutemesalig.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/6e750a168b404c7a42b17e1a96db32b8/15151354098.pdfIn PDF document text
    • https://palet-school.com/files/files/10124131986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=south+of+your+mouthPDF 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_off0000c96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96C 17636 bytes
SHA-256: b1f91d1b6a6475f4051249411c8bc68bd52f4f412cbaf7aaa1d5085853a7413e
font_01_sfnt_off0000f7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD8 10064 bytes
SHA-256: 2107f0f13cdb7e9f41a13192108e19c9a8a7449db9413a120f627d9239f60474