Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9eebfb55d54b89…

MALICIOUS

PDF

95.8 KB Created: 2021-09-15 06:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 281996f28082e4fa38c6ea83236b6682 SHA-1: dc6a94f093b72b558c7983cb078c865bb2ec9689 SHA-256: 9f9eebfb55d54b893b8231354fcdfe01804f3eec15be73f9af93a0bf34abe3d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. The document contains a large number of embedded URLs, many pointing to unknown or potentially malicious domains, suggesting a link farm designed to distribute malware or phish for credentials. No scripts were extracted, but the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://3dsami.org/uploadfilefiles/fopevulevupowiraken.pdf In PDF document text
    • http://www.nomorcantikjoss.com/file/duwutuna.pdfIn PDF document text
    • http://artospace.com/pics/file/nufokozobag.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/202191493454187.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/panakusipefikavalib.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/zafesapumop.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/fuxeximegibubuzuxidote.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210911011107_gja0f2.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/poziv.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/68330210939.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/kobusosulis.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/45259018013.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/kexatadibetutobisa.pdfIn PDF document text
    • https://riolisboa.com/images/ul_files/file/mvdcNkAl75p0.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/tunojigabemunatulizaxe.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/95464510160.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141384c4052d---43983682415.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/sixugola.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/30918025085.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/mqs5j08bcr0h53pub9kk4gcfii/genitarukaguvinovuza.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/jujiwek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=get+into+pc+windows+7+isoPDF 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_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 10376 bytes
SHA-256: 112ce412d1ad8e70a20292d17f5a66580026b89ea0317ba522eaa9e8040fe0b9
font_01_sfnt_off0001285b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285B 19056 bytes
SHA-256: ad172590c42a70acc5ba9b522d75c3c6388eb91732a0715759cace0bbf42ff1d
font_02_sfnt_off00015941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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