Malicious PDF — malware analysis report

Static analysis result for SHA-256 b064f02cea8db575…

MALICIOUS

PDF

88.2 KB Created: 2021-09-02 17:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4ff97d84b3a0c9339780daba89e99c48 SHA-1: 45649dbc7a491a8c88ac87b9541a587675def006 SHA-256: b064f02cea8db575dfce7f5ddf5517940ec0c479600876e70685bfa9294a7d36
104 Risk Score

Malware Insights

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

The PDF file contains a link farm, with multiple URLs pointing to websites hosted on compromised CMS platforms. The ML classifier strongly indicated maliciousness, and the presence of numerous links on disposable or potentially compromised hosting suggests an attempt to redirect users to malicious content or phishing sites. No scripts were extracted, but the structure and URL findings are highly indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dilazikexaguvapivokered.pdf In PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/78908087678.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/dc0663052b3c7d67b807235c26267409/siviweroxuzanifeb.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/mukafikibukajules.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b73d5fb1e---30198394509.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072572f2a9ff---64251873233.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210605_6DE7CE0E205B37C6.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/sumafogakilomilujilak.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/muvevumalugasexojusominut.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/voridavazev.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/samoduv.pdfIn PDF document text
    • http://ausafe.net/images/art/files/nisitinusupiwarabi.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/0dv415b77721hde32thnekfsnn/2610188984.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/88a7daec83bb79751a7d963e823726a1/wogukux.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba77dba2036---pesof.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a1e55f7b---refas.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/96930896412.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/mopidapitegavibekexakewes.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///59287844075.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/53100399585.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/31204713722.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a65ed784fe---12047919125.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/27125768498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+story+of+an+hour+questions+and+answers+pdfPDF 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_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 18052 bytes
SHA-256: 54fe7b345cafd92b725e450e41f646fcabbe1a6534dcedaed5a6883ee0e078dc
font_01_sfnt_off0001219a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219A 10956 bytes
SHA-256: a3b049e81b5cbc981384d0ad385338228cfd5fdf64f5977791cfd9f226762638
font_02_sfnt_off00013add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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