Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae63807a7aaf6e07…

MALICIOUS

PDF

85.1 KB Created: 2021-07-17 15:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2b729f8e13029e466f8833147e5d7b6a SHA-1: e754bd013a18f64ca63079e9ef5d8b5b31366fd8 SHA-256: ae63807a7aaf6e070470a9d1aa97b17c0803c12cb4b9c567f6470d0b5a9a2506
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The document employs a social-engineering tactic by luring the user to install a browser extension or update, a common method for credential theft or malware installation. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it acts as a dropper or phishing lure, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ratsimae.eemedia/contents/file/84654087554.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2475aae57b---zatumafumukolonivi.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/80675653726.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c870312c4d8---vifepusowutigob.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16214318835996.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7be4022bd6dccb3277afa706e7847033/55093621786.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/lumuvukag.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4bc447d7916c3b8251a28689069988fd/keginevotupakixubila.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a185818570d4df7aae35502730310980/12418310479.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/dd8342ffa5e64cf4d9417993cdf2bfd5/lefozuj.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/66787282956.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/8e36664ec018410fc3d354b8f829d2b3/lulakexukopasa.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094c336dd659---fagarusebetiserolijixukil.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ttqcm9rct15a2a06sbbrbck0i6/57781417046.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/f97939b0fe1a571361358933b8ac3fc3/zogegokafazujon.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/49964586308.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/zusodajapikanimuma.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/lalus.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/fozopumifufi.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ed810c13---mobudobod.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/dojisuwezupe.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/girubiwetol.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/6anki5cn7pbejdruju5ifbqpcm/lubazafevafixifupimewomej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=free+mov+converter+to+mp4PDF 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_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 10188 bytes
SHA-256: 8160093c8ec21af5de23b203eac7a4568a6a3fb8a1ab53561f0e37caf9dbd74d
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC3 16944 bytes
SHA-256: 1be0722b3b1928bacd47e8f95cd113248bdbf9f299f992a3aadd94a66614144c

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