Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfefb78d89cd60b…

MALICIOUS

PDF

114.4 KB Created: 2021-07-24 21:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a2c670b45b66a7079b74ea9abaec896 SHA-1: 5f7f521d11ee84410257225a6cad1abcb0d404bb SHA-256: 0dfefb78d89cd60be421595e6ded30dfdb076c2b031505b80c2884e10efa0964
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm hosted on multiple compromised websites, suggesting an attempt to trick users into downloading further malicious content. The presence of numerous links to disposable hosting and compromised CMS upload storage reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://abogarestudio.com/userfiles/file/zadamivive.pdf In PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b5d834fec---72865573317.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/lejomixotanuvap.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e3e3bf1c---70547727458.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/25493779389.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c2bee5646f55d492a30eab8883f8d0c0/78500187451.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/25709031858.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082c58ee62fc---rositugima.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/20351919715.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/2086134944.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/sabuninim.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/guzivit.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/85147962130.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ibnk78er60qs4r49lsaklg4ds7/midubezokixata.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/a8d40d11344fe288ed4b5d6d4f5c1057/manosedu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160760be32c750---samoberiwojif.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210626051403_kizd3m.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/1v0sick6fg1em5bprq10bnq906/pavemunakuxatasevajifo.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/31573348495.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/sokojulevogifib.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe32766486---80276664329.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/tivekupowikapawe.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/oe08ro54tcum9vb1642fia0oh9/novapomarigakugirarobi.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/70528383472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=realidades+1+capitulo+3b-9+answers+page+66PDF 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_off00015d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D36 15900 bytes
SHA-256: c33cf9ed4482e477cfa234ac1e8d5ef704e0efa43658eae7bb77177ccb7b9c86
font_01_sfnt_off000185fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185FA 11656 bytes
SHA-256: 48b7d1476246f2680cebe1e32b52eac31437f5b13981a7732e19e3f8676b538d
font_02_sfnt_off0001a184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1