Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daf89be19386e8e…

MALICIOUS

PDF

80.2 KB Created: 2021-11-01 18:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1a3765a452639636d62e732517c83ebb SHA-1: e744db0de0040c605a8f59f494040fd4419e9bd8 SHA-256: 6daf89be19386e8edb52bd4b062d3ace2a790e69ba3ca9ee07814d275270a4f8
182 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a heuristic firing for a 'ClickFix' social engineering attack, indicating it attempts to trick users into executing commands. The document body is heavily obfuscated, but the heuristics suggest a lure involving a download button and instructions to run commands, likely to download and execute a second-stage payload. The ClamAV detection further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://domgr11.ru/uploads/files/xoxatikudepogizodevobodo.pdf In PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/10530771864.pdfIn PDF document text
    • https://eguiders.com/uploads/vadezifudofirigef.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/bapobeti.pdfIn PDF document text
    • https://kermanrooz.com/img/files/tifilowafurufesalisaziwe.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/28112401667.pdfIn PDF document text
    • https://plasterglasgow.com/fwd_docs/file/gexizipixugixunenobesilur.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/84243593217.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/porunubojubamewofotudov.pdfIn PDF document text
    • https://eurotig.ro/file/gonibodage.pdfIn PDF document text
    • https://egf.tw/test2/images/file/mimagiw.pdfIn PDF document text
    • http://karczma-zaborow.pl/userfiles/file/fozadogexogudijugimup.pdfIn PDF document text
    • http://aec.dbodm.com/js/upload/ckfinder/files/89878480778.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/xojotikavalamivixudak.pdfIn PDF document text
    • https://sino-islam.com/upload/file/221910573625.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/poxofivan.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/10501275981.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/41153243040.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/756226ae8f167f2153c7526a4e02945c/58752487831.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/detubodavo.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20211001170452.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/mawelofazikabolikaxal.pdfIn PDF document text
    • https://datajournonepal.org/files/vofagojenuvulelib.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616e1d771e2d8---54948697322.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/5bhJmFgkeCE/uplcv?utm_term=uebs+download+free+pcPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/33399943538.pdfIn 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
    • 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_off0000d135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 10656 bytes
SHA-256: 51db6bdec723d43a5ad9f3c6f58dc4ff9c1a32ab66786016e825ae4d03c96aac
font_02_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 18672 bytes
SHA-256: 6db0c4a1733a46eda895305a4700a3608ba8c8a5aa15bb6107279bfebab01d3e

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