Malicious PDF — malware analysis report

Static analysis result for SHA-256 002327ac959331fd…

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 08:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6c88270e6df7dc648bd2143fd60cc39 SHA-1: 34e2289a7523e8de2801035b229985784f8e3d01 SHA-256: 002327ac959331fd7357e19b7618b29b5bbb3dc0166733ccab4e430f251df4ed
156 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely lead to malicious content or phishing pages, aiming to trick users into downloading malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=downloading+vidmate+apps+2012 PDF link annotation
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c5d6f27aa9553fc4ca7cffde7f582a29/28173564705.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/dovowitetimugesuwetis.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/38012199031.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210917_072154.pdfIn PDF document text
    • https://dukupahit.com/contents/files/tosijajufediboti.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/52217025952.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613791d09f6d1---vositakakewebuxujegifiko.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/17580405083.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210916054648.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/mekovotufunoj.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/donepobi.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/wepezanovet.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/10757111717.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/5273990773.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/84865482367.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614451ca248cd---bofewujanag.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132b3a630aaa---35707156329.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d235daad9---69353805495.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/39412156946.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/tovizewadanujuvotagoduv.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210910_7C2FEC05A8BD188B.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210902_023556_6770.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e5a187f22e458ded5c7e02c5e94171c/gemolaxagegosir.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/50863724203.pdfIn PDF document text
    • 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_off0000af18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF18 11084 bytes
SHA-256: c6185b13e0b65b1a175336afa68c5ab9064d2b917e9a1ecf68077c59c5cac2c1
font_01_sfnt_off0000c8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CE 14944 bytes
SHA-256: b17c11f2984c7887335d0d8d5ae7fd012d64753dc4058f11476b7a922cce2798
font_02_sfnt_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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