Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55940b3b2dbefa8…

MALICIOUS

PDF

80.3 KB Created: 2021-09-08 18:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 135ca80acd71a313ec1a27809cc4556d SHA-1: fc4f0ec4b5f075429d130a4e2229809f6eb399a0 SHA-256: e55940b3b2dbefa8fbc3f92e74d6f794d7db0296e607cdb2ca6c26832b494b1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to websites hosted on compromised Content Management Systems (CMS) or disposable hosting. This behavior is characteristic of phishing or malware distribution campaigns, where the goal is to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9218b32b60e7298ec003f7985b10b922/36136585882.pdf In PDF document text
    • http://wtmongolia.com/materials/file/lesipotap.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rn1kjhogscoo0osfem8v4ia9b7/bumer.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/89300961591.pdfIn PDF document text
    • http://voijin.com/userfiles/files/77012095007.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131225b395e4---88309027902.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/xowuvumujumaxibipul.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/xoxefobuduxigataw.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/xifixuxekijaxage.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/kemabefojunofeka.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/zepisikuxe.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/45193193371.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/wexulebemer.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c9d091fa52118b8d3dc3a4aac3e7303/gerejofutefopidetogeniz.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/49637873368.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/81236952609.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/32044742681.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/86425680333.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/94752242080.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/79719058821.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/25845010937.pdfIn PDF document text
    • http://xhzhengli.com/upload/kuzigukimubelinulo.pdfIn PDF document text
    • http://195exim.com/datas/files/diferukapulalurapivaw.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/xodaxagupufiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=types+of+manufactured+boards+pdfPDF 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_off0000d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 10960 bytes
SHA-256: aa0695498790566a9090a29ff10029e9a6d6108b1cafcd9c675b1144125b6dd1
font_01_sfnt_off0000f10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 16816 bytes
SHA-256: aa4ee21d861c71dda463b1b3b1286727d999e529cfb17e080dad457e7349e2f8
font_02_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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