Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda20ece53bab534…

MALICIOUS

PDF

96.9 KB Created: 2021-08-09 23:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9cd37357bea03d4d60d7223914cdedcd SHA-1: 4189a16024d9c84a02cb177608a3c2553dddceb2 SHA-256: fda20ece53bab53491ee0b7cfe0fbbb78d527f670d5ca3ea30aab12fb6ccb8e0
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://alt-1c.ru/userfiles/file/70241385039.pdf In PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210630115056.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/vogogujuxapukuxowalu.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/o24u27tmpt58n7ef1cak0cn5lk/lebimakitojetapizatej.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/390f63a9c499819b95a257856ab36c22/48172177703.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec7ed018ab76546691f103794065aa27/44926999511.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f289ceb6---56531515552.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/mugokipovanedenakopofe.pdfIn PDF document text
    • https://luminex.pl/upload/file/75483946549.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/kabinaputufobuduxexojigil.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/34876999839.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/17073099442.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/68762096039.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078a1058cb4a---vataditavixedunirumigitox.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c93e720bfbb---20653188584.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a71737f15---basuk.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/26177732956.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/pikofa.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/tumuwidazaguposuremezebub.pdfIn PDF document text
    • http://pvvc.cz/files/44131612772.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/162819643816710109435.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/38367391530.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608337132752f---suruwunawuvolesuvosavibuj.pdfIn PDF document text
    • https://roc.mn/uploads/files/xeruzanodepamipeme.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210506073038.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e9a5734eb---81798044998.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/wufakaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=moviezwap+telugu+2019+movies+download+f2PDF 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_off000113aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBC 17784 bytes
SHA-256: 3f8b06a3e49713eae2536bc29d3495d11afb7914c1d5e1fa560a3a5f3d93fc9d
font_02_sfnt_off0001597b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597B 11508 bytes
SHA-256: 74a1561aae07641120cfc037c02a30cac48b6a64404e456f36b66d9b4643cfca