Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00ee814765ee940…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 12:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 452ab05b71c559f1d3456ecdc4054ae0 SHA-1: 565e73be15ca0421afc80acf9380b5babf7d8c8c SHA-256: e00ee814765ee940c99ac37a6be7f7bca54cb1f2dd69c3a6ba0fe95ff2cf9ecb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as phishing. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • 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://icon-studios.com/userfiles/file/muvisozuwuban.pdf In PDF document text
    • http://cuacuongiare.vn/upload/files/getajuganibegosojujumudi.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/66848732018.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/lametuxazulo.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/98606283060.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/18749027111.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/fafipibugavumegepof.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/vetajaduturonedovibopo.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/35325183306.pdfIn PDF document text
    • http://esistore.de/userfiles/file/nogarogi.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16139c57e92850---tosubiforam.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/26318500120.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/xuligegulonomivoberokige.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/bakalegetivuwugamopobijub.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/xejuzo.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/61126003957.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/12744565776.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/nelosimalefovejigizisax.pdfIn PDF document text
    • https://topupdana.com/contents/files/65906912122.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/33344078782.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/gogumonugo.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/19389285371.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/wurufazusu.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/43647769421.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=after+we+collided+solarmoviesPDF 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_off0000d568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD568 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 10664 bytes
SHA-256: 1fbea4ca849a96cd600916841fdb3892336228bc430f3ef07406823d7093d010
font_02_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 20536 bytes
SHA-256: e83845992d35f277d77e1de8e620bfb48273d3d7fdea46e52739e5e5737efc89