Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16f7170036ba7dc…

MALICIOUS

PDF

115.2 KB Created: 2021-06-15 17:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d08426887a0fe6a121657dd1ec1572e7 SHA-1: 0f2e0cb7c7c58399c4b07852735591b03dfe0a1e SHA-256: a16f7170036ba7dc948580ee2f381590cbf02c72e92beb063894d9cfdcea1858
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious URLs. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://garglob.ru/uplcv?utm_term=street+dance+of+china+season+3+lay+zhang PDF link annotation
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20346d2cb6---13425787331.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609e563467d7b---nilozoviz.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/o72lhpfh15cc143mdcvvcoc0st/nigenuxakotarizenosawere.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/9642722002.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c880df49b73---bopeviduwowitegu.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/77fc4968863c9217ac360bd44206c975/38890153547.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021051619524610547.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ral1s84luv5pa8b257libnd5f6/rapewilujebumetajaje.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0bf01f9c6---gawosaligub.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a871fbfceb---xepawirajaketoj.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/gorapesedixevag.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210525094527.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b694a61d---15187155615.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724846a5f92---jazug.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607016efe5292---junope.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795890dfb4d---1103843650.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/29623825897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000faf1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFAF1 12324 bytes
SHA-256: f121649c782d607f64f6ba3de75b7d92e68cba947479f7c036a82957dd947613
font_01_sfnt_off00011d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 14324 bytes
SHA-256: 91b6581d6c50fa3baa952a0ecebd9457cbc62aee27a979d3d9dfbca7d1b2ce8a
font_02_sfnt_off00014aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABA 5492 bytes
SHA-256: 70e60e9d0ec88853c99e15c69fd425f6588f11edd5b69a205e8b8da4dc418646
font_03_sfnt_off00015d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D58 16988 bytes
SHA-256: a875933ae6760e6b15eb17aae0f28f552589843b5ce699cb7b918f2a7a02e402
font_04_sfnt_off000190ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190FF 16260 bytes
SHA-256: 408e8350774b5bf779a00177cae4802fde9ec3a709cf16d2863d41eab3f5d734
font_05_sfnt_off0001a681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A681 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_06_sfnt_off0001b434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B434 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

Open this report in the interactive analyzer, or submit your own file for analysis.