Malicious PDF — malware analysis report

Static analysis result for SHA-256 7959baa1949234e0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 09:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2d507a39d7868488e51f604fd8ce6e7c SHA-1: f035f026a46090b9bc9de5afd3289898a1551232 SHA-256: 7959baa1949234e00197d93650c5cb24d5aa0c78aa3a0261dd5bcd910e8c765b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://garglob.ru/uplcv?utm_term=yamla+pagla+deewana+2+full+movie PDF link annotation
    • https://smobiil.eu/userfiles/files/gusipelenagivoz.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/13564979735.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/babimoluxefirateluva.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161360eac2c0ec---sanosakiwe.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/kabidizewokuziworamuzuwu.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/zasiroxofodubuzeke.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/59481374387.pdfIn PDF document text
    • https://path.mn/userfiles/files/49382841035.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/be8f43ad2f22a1f50891db2f82d1128c/fajuvowuwot.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/34c61fdb3f54680ef3271e4c2f5a967d/soguxuginiridigaliv.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/murokolidixowid.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/74725716638.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/bosupodadorobatibefewuv.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/76262451977.pdfIn PDF document text
    • https://olterus.info/contents/files/tetoxoji.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/kimekabif.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/faxezonoguloxuvav.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/68075c5fd3a9b3f1b7f26a845dff2ee9/wizejebexixe.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/naxavenefexere.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/53956259060.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/saroxofinogelafekir.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/dbcb04d7efefd454dd8575e069d77bdf/97778220413.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_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 10832 bytes
SHA-256: 7e885dbd5ccb58d3658c5affef5ef9918620afc66e1dfdccb8890f1843e2f154
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 17080 bytes
SHA-256: 72ae50daa1623fab38f55f2aa6d4186cc86e981d4e1119506d2bbed63215df25
font_02_sfnt_off00011e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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