Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db05b1b9ee62b0a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-11 20:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c0ce710d4a423a0ec7b1f979d205361c SHA-1: 97c9e7a17970e35135d6040092b8a67f776108fc SHA-256: 6db05b1b9ee62b0adb756ed2b0a3fd9529e66780ef1a5bb2dbeeb582d5aa45a0
134 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, presenting numerous external PDF links, likely to distribute malicious content or phish for credentials. The presence of a 'download button' heuristic further supports a deceptive user interaction workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huanghecables.com/d/files/56611982159.pdf In PDF document text
    • http://tribo.kz/userfiles/File/36435136801.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/45098780897.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/71427927914.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210901050338815.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/29946894432.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137069c28504---59248458288.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/25748001989.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/40023795382.pdfIn PDF document text
    • http://asqcert.net/files/files/gebigogav.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/bafumagotol.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/fobenudakimupan.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/2998637237.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/36185054491.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/31750980842.pdfIn PDF document text
    • http://secoinblock.com/upload/files/gajewujewomu.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/fozabazifijizam.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/dawebidizexomokoxafabom.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/3937698409.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/33064125687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=aksar+2+hd+movie+downloadPDF 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_off0000e1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E6 10760 bytes
SHA-256: 1eae4ba13671b9696b3115de97917623f9bf5416ac4724714d4414f3f1685119
font_01_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 17256 bytes
SHA-256: de671c0d07eb478fce6f2a18e82c95f27e564e3fc203774800871028bd1883d2
font_02_sfnt_off00012750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12750 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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