Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a0b2c112e34a65…

MALICIOUS

PDF

84.2 KB Created: 2021-06-29 23:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 734bf7e51a29e4bc560d5a1a9b1f9adc SHA-1: 87a2a83c3b58a2c31c5644fa58bc0fd0126f697f SHA-256: 95a0b2c112e34a65b48e51c55554e5da9982681a667dc66d46e27a8e723f7a2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a link farm pointing to numerous unknown domains, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of embedded URLs and the 'link farm' heuristic strongly suggest a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://hesexpo.com/img/editor/image/file/92514096868.pdf
    • http://tapestry.cz/images/file/files/reroj.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e56fa8394---bupaxifamurugud.pdf
    • http://chalappuram.com/userfiles/file/mupipomidoxem.pdf
    • https://agatanorek.com/files/file/golobojaz.pdf
    • http://zoop-tech.com/ckfinder/userfiles/files/vuwunatutabigurarumubogo.pdf
    • https://accuratesearch.com/userfiles/file/worafebufukalowolumerok.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a71f4cc3881---99671728001.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/4911a6d66bdb4b792c0cf6ec588cb8c6/dotabigamevakuwifetifejup.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/6dea9cdbbfffb74f841e9d34029853fc/99389495612.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afc0f1788a6---65117005114.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c1200b07e---89141203172.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b2febee0b---64973745238.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/7f79afd14589040b929235c9e65317c0/71733251283.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c966e9dc---kakarez.pdf
    • http://svaz-podnikani.cz/files/file/radanirasugalodo.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160799d5832d58---xofefibalozijilapide.pdf
    • https://cottonweb.net/userfiles/file/11308915035.pdf
    • https://mimpiindah1.com/contents//files/95330462171.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/72982572972.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0c7a4ca60---temikijid.pdf
    • http://crackershrimp.com/file_media/file_image/file/79672512089.pdf
    • https://bataretak.com/img/files/file/xotobadot.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a8bed9f82a2dcda6803f0318b51b264c/81719269533.pdf
    • https://esz.jp/img/editor/files/44779197972.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fake+iphone+11+camera+for+iphone+6
    • 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_off0000d9bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 16792 bytes
font_01_sfnt_off0000f1d1.bin
3d206f172683948f02f530cd43f2350afc9754e41de4f2df68f53f97013a0a56
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D1 26980 bytes
font_02_sfnt_off00012909.bin
a957ab07756f187945919bebf19e96575553b09b7f1259892cb0b9808a0f9c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12909 10720 bytes