Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb182adc41c9af4…

MALICIOUS

PDF

102.3 KB Created: 2021-06-28 02:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37f2d89360221df76c6bc9993a75a16c SHA-1: 55de4e93a171c8dde129eb776a6565f16ac70993 SHA-256: 2fb182adc41c9af4dbd88ca9a2449fc45a0c8369121c19e7054ec56692644869
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and does not provide direct clues, but the overall structure and URL analysis point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608018afd7cd8---wazirovefoja.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210624_E979576B2068E902.pdf
    • http://qunjl.com/userfiles/files/9469834288.pdf
    • http://vitanova-cattery.com/upload/file/vubogowu.pdf
    • http://spadhotel.com/basefile/spadhotelcom/files/59633071162.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0fe890000---65600123630.pdf
    • https://asthasupermarket.com/userfiles/file/debetug.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082215e9c768---24891635601.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/9o84sgju0dkt7k4qmer5mkq0i7/vibiroliwezukel.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fa7153f02---81688578106.pdf
    • https://andrejc.si/files/file/40133090734.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160afeac3acab6---dozaluvemopewo.pdf
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/f7564fdd2bf59a320e4a72f015886d86/61627286364.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c8e3ed74355cd1aa5b91ffd842e4543b/sofoxotuzowudu.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160755045f0072---vukolufebexuzexa.pdf
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/9b9fa94ad82976b34e4e9b302af2675d/vamanibadojaxigef.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b86bcaede2c---34743968208.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/c381752e8125fe20d2b45fefad8e4841/57218454551.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///2021062174912_1040137315.pdf
    • http://phuocthuan.vn/images/pic/file/miruguvu.pdf
    • http://fizjoactiv.eu/Upload/file/wuwuxejutoxazagodolikaj.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/iquioii5p2648711raoi5uggs1/tiseru.pdf
    • http://re-view.online/fckFiles/file/66839480675.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=our+lady+undoer+of+knots+day+1
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb05.bin
abf721d888c52e6bc192b4cc67cb6d49bb4b986317ddc4b39fe69f6814025a01
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 17536 bytes
font_01_sfnt_off00011573.bin
b698fd95094d901836b2cf1bc2239a49b795add3e9d0283526da8c76ff9d25b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 10636 bytes
font_02_sfnt_off00012e0f.bin
65c3f52d4eab9d9538ee39bc6a52a8ca4a26587e52462440295f1a12979da116
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0F 22496 bytes
font_03_sfnt_off0001649c.bin
e50af2df7d09c16236496f6f1193fdecbde552c345e66e90468c1a46953f53fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1649C 3168 bytes
font_04_sfnt_off00017139.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17139 16792 bytes