Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6446feaf3c4adfb…

MALICIOUS

PDF

95.1 KB Created: 2021-07-22 16:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 647258d09436bc04408cbcc3f0d96059 SHA-1: 73149134fcce4c01e39fa4500f6bc2f6dde79309 SHA-256: b6446feaf3c4adfb39d08f4a9e0a3aa73c4d5308461d3ff8efe4b4382862f01e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://chpcentre.com/files/file/ginomegixidepogor.pdf In PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/81b63ba07f2c58806faecf91996f7cb1/pilopitadalikekidebig.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/77530216638.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/a1097d80f33cf39f35bfa07b23ea231e/sevuzofisunesomijupuwup.pdfIn PDF document text
    • https://kueapem.com/contents//files/51514462434.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/ea71e65aec88561a4175131e05c83643/48692354831.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d07f59bb67---59324411121.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/82600669525.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/nukekefivefotigow.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210616_004055.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/guderejinifojane.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/42590867135.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b733265e3---9912388740.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c80bf83b8c6a7de3fbc555f81f0f4c66/jodoladumedi.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb336b02b8---27398961933.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/0ctbc0avfl1cne6bhlcg8ndm5k/52429209216.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/90186204733.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c980177934c---36223363884.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/88692369067.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccb6190c62---47463749298.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2746f097b---mumodo.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/32971131632.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969a07249d5---17782465331.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/nogulosibufinakani.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c75e68fd05dd9efdde8b15af96b955ee/buxirefutereza.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cec2d8dd2---botisegiwurevexawoxonat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=aa+4th+traditionPDF 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_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 10060 bytes
SHA-256: 61278416b67e214208603c3bc9b336553e734f4c503b787b001c394b9dbd3e97
font_01_sfnt_off00012948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12948 17464 bytes
SHA-256: 86bf2663621f93896980829bc66b6348fd25fd41a3f72fd9ced894ff76829a93
font_02_sfnt_off00015715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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