Malicious PDF — malware analysis report

Static analysis result for SHA-256 5555bcb9f5dd283c…

MALICIOUS

PDF

87.7 KB Created: 2021-07-12 16:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b813a6097418fb967a389bd0da11524e SHA-1: 9990687fbf2da19839fddcb226a85df4e77a2d15 SHA-256: 5555bcb9f5dd283cd03907fee36f4f6ec3f2ba87cee799c96f61fd8dd1f0f275
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, designed to lure users into clicking malicious links. The presence of these links and the overall detection indicate an attempt to distribute malware or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.alexgis.com/siteuploads/editorimg/file/12974110137.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/9e17002983091fbc7c61c77a22d23419/14589402367.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c23a08c5d---dasewopumuwaziwozuranesa.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/2tjbto2pmcmhqkcfp4hc2qemar/60374964577.pdf
    • https://szud94.hu/img/sajatfile/files/lafiwave.pdf
    • http://fsoa.cn/userfiles/file/84043784242.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/0i1vg9hufrnes7br7cbhbcr876/63847114349.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/ans813phqq5r9kaefikconbhuh/62327114367.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/rurizujejaxabudosum.pdf
    • https://daaeportrett.no/upload/file/najenunetuwirisa.pdf
    • https://capitalsyndic.com/userfiles/file/87144104329.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071af6be0aef---96242181043.pdf
    • http://tingyi-bnb.com/CKEdit/upload/files/zofidulaji.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/77044eb83869afcbbbc31134cbd1d1f3/sipoxim.pdf
    • http://tscyw.net/userfiles/file/20210613012104_hus8pf.pdf
    • https://anfauglir.com/images/file/jelonigoxolum.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b9999ef6b---5348153830.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945b83a0c5c---kotoxoxajolujiwiwi.pdf
    • http://www.allatpatikapecs.hu/images/file/81525946602.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1b08ca88c4ffcebfeb6acc2c9b83e097/4235368998.pdf
    • http://gustosandvic.com/ckfinder/userfiles/files/rekixoraxigo.pdf
    • https://thefertilizergranulator.com/d/files/11784091867.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e28b7a95---14816954354.pdf
    • http://morard-mcf.fr/data/Files/mikivokovirixixemuku.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f52e31e1---weferekanijaneti.pdf
    • http://norilskgu.ru/userfiles/file/46922580626.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=poems+that+have+personification
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c0.bin
70623345952f28db509a8ef81ad1e82eae736b9a94d037adca3302cd0f34c267
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 10764 bytes
font_01_sfnt_off00010c69.bin
c3cd0ef04464716955782596746c601f126204f165b8c14de6030048e44b94f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 17188 bytes
font_02_sfnt_off0001396f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1396F 16792 bytes