Malicious PDF — malware analysis report

Static analysis result for SHA-256 a620219bfcc5316c…

MALICIOUS

PDF

241.2 KB Created: 2021-06-18 04:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 437cb7d986d4907f70982c7a66820916 SHA-1: d2d54f78bb36d4a579a20992ed950941dff4904a SHA-256: a620219bfcc5316ca65a533e6b3b95d08dd2c81b19e03bb5dd4749013f99eaa1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the ML classifier's high confidence score support the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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.
  • 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://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160724de19b831---kefozisi.pdf In PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/zewijetubuxapasozagudu.pdfIn PDF document text
    • https://inifd.london/uploads/file/rezoj.pdfIn PDF document text
    • https://avvocatoboretti.it/file/donezijesuwopujuz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/c062ec1193d184ef03b65c580b3a26ee/37425631800.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc65516658---bebipukesobidukubov.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609de7ee71094---94882197215.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c8d230a0d46---75895807705.pdfIn PDF document text
    • https://carlojans.com/cms/file/91426943611.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/jaginelanoxudikenutafi.pdfIn PDF document text
    • https://cape-electronics.com/media/file/79674612675.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608044afb1512---42056313336.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/40u5hmm56cm7seg34pvnbbu08n/53542932185.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949c1e0cd7a---bogevapelogo.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/29a34003e0cb11b8e1283e32b36d372c/senugomigu.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/aabb39fa0df2a8551e99160776d66872/43857851675.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/siwuwutuxir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=raid+shadow+legends+top+clan+boss+championsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00037bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37BB9 5628 bytes
SHA-256: 0e86ba74b1bb7e87403103f33f1268085ce54e3a74ea960f602b7592699a1e37
font_01_sfnt_off00038ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38ED3 11196 bytes
SHA-256: eb7ac594359d340d7a5690ddcc3cfc63df6afc09a2ba749f57fd9b833a085afc

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