Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2a17d3216efac3…

MALICIOUS

PDF

121.8 KB Created: 2021-07-06 16:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 069b4e8588d71634226de6ba178789b6 SHA-1: de995226bdf5c9e92af32e0ea5d28ca882306eb0 SHA-256: ec2a17d3216efac3cb4aaaf496ea4500e205290d6d3058f1f2d9492e909f5f9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9703

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://wastran.ru/uplcv?utm_term=slytherin+profile+picture PDF link annotation
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/a9agbnou6bjnf0ph479t4luljs/wozepesanef.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/06d0fb0ba6119776ccfd125f57ccb4a6/lemowawaxime.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/82384597059.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/969671499.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/medijupebewetajuderel.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/51e449d5de664c7b1a5b661394aa302c/rubugorejubijadawedigitor.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/046c8188f64cf31880bef1cd6da552c6/bedanewizetuxiwemovudusi.pdfIn PDF document text
    • http://alkanboya.com/files/file///59908063027.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/dodivuzibewebajebuf.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b53609ed7---99786840454.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9285623f8f---65017181068.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e1acd66f8---8333169500.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-29/20210429041846800464.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/kubabuki.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/54748969862.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/02t72et05n6urqe5lvhnb93df7/xopil.pdfIn PDF document text
    • http://lucann.com/Upload/file/dipena.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608096884d0ec---14042649215.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ce52c8784---76008803591.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/21305340542.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97138bb373---81952726180.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/fuzanesakejivujazifekew.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/ziroretevonugozijagad.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa628d9d995---26348508302.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6c82bcd5---vavudozepejuzogu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14275 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A87 24532 bytes
SHA-256: 1946e13a5158733606bac81884582217231afe411f9e76243b5f2b1523724afc
font_02_sfnt_off000198f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198F3 3420 bytes
SHA-256: fbbe567da29adbb22eb9594dabda35b98a0be87d3e7a0ff0a6fc94d5761094fe
font_03_sfnt_off0001a663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A663 10536 bytes
SHA-256: 00df28ebd2197a1523d83a80899151a58497c62d9f7a311767606133b294a626
font_04_sfnt_off0001be59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE59 17196 bytes
SHA-256: 08c2c2584065e5c04f762cab9ad75af46e5ed0cbc7c2cd9af38c3a139aeb8862

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