Malicious PDF — malware analysis report

Static analysis result for SHA-256 3592988f8bb6a576…

MALICIOUS

PDF

82.0 KB Created: 2021-10-04 14:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38273b9c4d4f071dfa5eba5b5932c86c SHA-1: 9220ee794890019884f88272d4d43b8c2f7efeed SHA-256: 3592988f8bb6a576c3a5874ab1d37873c829923aaf636697c5fee65a8a909787
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The presence of multiple external URIs and link farm heuristics indicates a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614df3a0cd317---25689937809.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/9228f608433dc307ebadddb8e908f015/worewebubatubezo.pdf
    • http://globalfeedindustry.com/upload/files/fexanijomutupomoboke.pdf
    • http://metrominicabs.com/survey/userfiles/files/44106504904.pdf
    • http://birzebbugastpetersfc.com/files/file/15284259897.pdf
    • https://shopinhome.com/ci/userfiles/files/73178485078.pdf
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/gezosazonavagusis.pdf
    • http://tko.wavedev.net/img/files/files/36710529529.pdf
    • http://krasneclanky.cz/uploads/buzudevarivos.pdf
    • http://teifsepahan.com/files/file/jexiterifup.pdf
    • http://roland-toys.eu/userfiles/file/fibapokanikibakuloli.pdf
    • https://ymvii.com/admin/upload/files/49461579508.pdf
    • https://sharenkon.com/files/83299693824.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8b80dd4c847fc31389f7db421ac68a76/26969334590.pdf
    • http://carmakers.cz/userfiles/files/2647052256.pdf
    • http://royalgoodviewresort.com/Uploads/file/23596741825.pdf
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/dotadejupiwa.pdf
    • http://jnejendomsdrift.dk/userfiles/file/vedarenidatofilamixuva.pdf
    • https://terminarz.online/kosmetyczka/krakow/files/76727374971.pdf
    • http://logisticsnetworks.net/ckfinder/userfiles/files/pudibesekabegugoxojerita.pdf
    • https://gastriklandsbf.se/UserFiles/files/24956957987.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/22b6010f26c92e3e8df196a09171efbe/73739259638.pdf
    • http://irvine.songhakbbq.com/uploads/files/megazelazobawurewos.pdf
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/84405454906.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=uncrc+child+friendly+poster
    • 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_off0000d95a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 16792 bytes
font_01_sfnt_off0000f171.bin
310397c9c4f2245ae7862d67284aa9210f6d01dd7194cf82a1ef7ddd159c0fe1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 10676 bytes
font_02_sfnt_off000109cd.bin
76fc38c5cdaefa8e5f522caef53dfa937b54237afd588542c6227eb8fd0fbc99
pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 18112 bytes