Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ff6da673f16340…

MALICIOUS

PDF

88.6 KB Created: 2021-07-02 09:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89c56e875d83fad9b18e0c16ee1f2db5 SHA-1: d652f28198b3ed5b61e74b37552877302e6d9509 SHA-256: 62ff6da673f1634088d3e6ff5b3e085cecd06f5deb583296cee7a0f0bf1de76f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous URLs pointing to compromised CMS upload directories and disposable hosting suggests a link farm designed to redirect users. While no scripts were explicitly extracted, the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b828d284097---42696555135.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/84c951a4c7c8d628bc75d5ff91fb065c/54504966798.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/1028c98df49c5628956b77455992ac6e/zozejizero.pdf
    • https://mama-light.net/business_school/uploads/file/72328372721.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473949f916---pedalolafepa.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/38edca093722191df25d7effdbab660f/56477537703.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/mevotikimegojonagiliv.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b7d7cca9b09249f26f7faa465040d062/fevelekipidiva.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c707a7f419---43464644439.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b506a83abf9b2cf6d8f9b2b3597299f0/6385239368.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/pijpjnpr0n9rq4bc27q1qvo2qg/vunuru.pdf
    • http://akcjonariusz.com/UserFiles/file/89399772489.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737eb29b7be---30128104323.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/96779250109.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/57804e1b4a70046d89289629a3411e19/kawosulixidomavolazemawo.pdf
    • http://ajivikafinance.com/userfiles/file/dorozezedinovexozakisuwu.pdf
    • http://pphu-joanna.pl/fckpliki/file/353556029.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/f191641114933b838d4efe8d4955c8eb/55109166223.pdf
    • http://boathousebrokerage.com/userfiles/file/dovivesamaf.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/sdsdjmquvnt1b6s9c8d6hln6l4/35817740998.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/po4nd7giqddj6u25bcj1mjnoqc/62030002397.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d34673adf4c5eae0767e01c8002737b5/55757252537.pdf
    • http://renovfab-menuiserie.com/userfiles/file/62007304641.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbcbf8a02e6---97212551867.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=is+the+a+short+e+word
    • 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_off0000f4f8.bin
b6b9ac41441f31bd59364049ad75178955c34f9e08941615cfbb0628011f534c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 18532 bytes
font_01_sfnt_off000124f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124F6 16792 bytes
font_02_sfnt_off00013d0d.bin
fe74ce08cc6c42279e3fbe0dbcb4e7f9ab4eda45ba703d0d9801c1636b40ca74
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0D 10140 bytes