Malicious PDF — malware analysis report

Static analysis result for SHA-256 3274100547147888…

MALICIOUS

PDF

91.0 KB Created: 2021-07-24 03:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0106b3bab2b93efa1ebf9ff05319cd72 SHA-1: 285145df14a9092920136dd720116b8a49021df2 SHA-256: 327410054714788840340c44c81d4375034d907b4cd0bf2f381c634e6947644f
216 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior by attempting to trick users into executing commands via clipboard manipulation and also presents a callback phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely as a spearphishing attachment designed to initiate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://chetanaus.org/bheru/uploadfiles/file/1526399435.pdf In PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/51fb4c766572551afe18bb843b53cc50/81263966594.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbe67eff7---vujidu.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/69lq7pdg8s1k5erp3k9bg46nq2/16595306682.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/17371566257.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0881c9297f---39417614092.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a3a1e1f0e7c41291befdc77d41da602a/nunixi.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/zijojabeboriwi.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/49154520893.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/11398717272.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/d633836f01e7092d772a9f8f01ea41bc/gudotobetojopezowazagapan.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55c049e4d16b079fabaa9a36f50e040c/sopopox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b319bf13b3e---65696235310.pdfIn PDF document text
    • http://csss77.com/clients/d/df/df7f2fdc42e243c7a03c192a8228c0be/File/zixorenepuwomefevogofixim.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/99553657935.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c415414cd---2599738144.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d90395b1---mimorolidatuvipapimene.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1d354e9f6967a0f63131cc631e2a023c/soriwesutefojitileta.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/25395207892.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/gozogetimixojag.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/zesavotudi.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/14575511245.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/49ecddecc0c5d024a368093da442527a/53636914974.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/gefefizubowem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=moto+e2+frp+adb+commandPDF 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_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 19764 bytes
SHA-256: b7cda76f521c8e3fa3b551354af80273444f0677152d9aff37f03704970f94b8
font_01_sfnt_off00012c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1C 10728 bytes
SHA-256: 555300f4a2c5edbf89568e8a70497b86f27aa7d5787558e5c8fd4a8677c7406d
font_02_sfnt_off0001449b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1449B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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