Malicious PDF — malware analysis report

Static analysis result for SHA-256 069837244c8f2c86…

MALICIOUS

PDF

84.1 KB Created: 2021-09-17 04:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef4d5fe70acdd5e09b2d9de48e1409f5 SHA-1: 46bf619837cb61043002df2d04e8ad09ee568de0 SHA-256: 069837244c8f2c86bf1d338313cd9079904e4a524000f9410b64c90f3a29fb6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malware or phish users. Although no scripts were extracted, the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140735ce96c4---41320268886.pdf
    • https://episcopiaoradiei.ro/files/degogize.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67dbe4f7a---67296454167.pdf
    • https://observatoire-omic.org/documents/file/2170848468.pdf
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/97499039176.pdf
    • http://thebankcardservices.com/uploads/files/jokumozedenemumogame.pdf
    • https://samsungklimalar.com/upload/ckfinder/files/79885911124.pdf
    • http://podolsk-kondicionery.ru/upload_picture/file/fafijujete.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16135b0a91a11d---zamirukatizoxuxogeloro.pdf
    • http://zatacorp.com/upload/files/vukukunekifemal.pdf
    • https://netwindowvn.com/uploads/userfiles/file/likifaribavam.pdf
    • http://htwy.com/upload/file/dajopesefakixak.pdf
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/49753288283.pdf
    • http://giteduguedesboires.fr/userfiles/file/daratajokixokisovab.pdf
    • https://www.assofmt.org/ckfinder/userfiles/files/57082448472.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/813b7e364d01fe2a3dbcc0c63f2ce145/82774632238.pdf
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/17960770655.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/57423345289.pdf
    • https://lingchuanfloor.com/app/webroot/userfiles/files/zuxupalakipu.pdf
    • http://amandatravel.com/userfiles/file/safejevolewanuv.pdf
    • http://bellina.pl/userfiles/file/5918164243.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3928a9a759e7a73c7066832229604a82/58880778775.pdf
    • http://gbfrjournal.org/pds/userfiles/files/71743018870.pdf
    • https://mosallaesf.ir/uploads/ck/files/vixizejetepe.pdf
    • http://www.prctech-th.com/ckfinder/userfiles/files/rejexezefowew.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=bsc+2nd+year+inorganic+chemistry+book+pdf+download
    • 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_off0000de41.bin
934d3dec571df0c6a0891301cd5cf7be3342712dc85076c302416346590f3364
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 11672 bytes
font_01_sfnt_off0000f99d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 16792 bytes
font_02_sfnt_off000111af.bin
0e964bb7d4136d4f0ee8ab245e2d22656870a3488627962c2464ba54ec04b8c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x111AF 18656 bytes