Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd822c78b262eeb…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 10:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 981b4a9f9b3a0f60432a26ab93fdf56e SHA-1: 45adbb12bda496eed9a76aadcf66bc26a15f1cd3 SHA-256: abd822c78b262eebe1dad484e7abd5b02d353bbca6d7bb5507332831c915bd47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=battle+brothers+steam PDF link annotation
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/f8719df96ebaf6eedf037e75ac5430ee/vatumozifonugudu.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8df03c4a59---82719165157.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d6683fa2dfc6b39e136af0d5972c20f0/51679577388.pdfIn PDF document text
    • http://remini.hu/userfiles/file/motapofafimolebad.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/zorexonesobago.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/3f3916922b853ed3cc8a1498f06c6af7/82638595722.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/3a10a5fd2a0081f13205071ec493eec3/xalukurikufuliwisijidiri.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/redawomal.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/28327848223.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa075c06dd8---xutulinejipojaxiz.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/vuwevagatida.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/rstecabdo7fv8ig99k42i02st0/sedakezazonusi.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/31139056645.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a2a5445af---gojulasofinivubupom.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210628132326.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160810aa2c2320---82234857238.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0157a34e1---pijasusijavobaji.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/bawutu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfabeb43598---46661010122.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d23dc073334---19505907817.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/10711757255.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d219c999853---18973185070.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/xamopuxagudezuz.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_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 10368 bytes
SHA-256: 1238ac176958ca3581960bf283c1d789f1cfb35e825839495ada8166b00fbca7
font_01_sfnt_off0000f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E28 19148 bytes
SHA-256: 78a3d5283a43d4fd9d72a6e6c533a4a1ad6149fa64a76f94fca2e6cdc6cb49cf

Open this report in the interactive analyzer, or submit your own file for analysis.