Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5a8a927652c05c…

MALICIOUS

PDF

83.8 KB Created: 2021-07-21 03:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7c3863cb8437dba7eb84f25825e30478 SHA-1: afe6fddb637a1e82356f49ca84066a0b6ac2c817 SHA-256: fe5a8a927652c05c51dbb03d90ed324c4ded1d27e394918281b851e33029ac8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/810a7b42d4fd6ebe853aa57eaf254986/1630704488.pdf In PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/91396930436.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88744bf3c8---lafinilutazilitefafi.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739f93bf1bc---36277824406.pdfIn PDF document text
    • https://ntc-container.com/upload/files/mosonex.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/72485660400.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf113ab7e6b---8536509104.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/85211420082.pdfIn PDF document text
    • http://954move.com/clients/4890/File/68519507382.pdfIn PDF document text
    • https://coluer.ir/documents/file/lidenorarivexexesemutekem.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0687341c08---91781021975.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/2o3kufc7q2au55mpaoa6l0asnn/64131134072.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a67d540691---18090467652.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/kavaradowegujitageso.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e55a0bc8d8---zamox.pdfIn PDF document text
    • http://ge-mak.com/files/nifuvanirokojulufoj.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/cc0626d3873c74f6dd7ceeb51505cecb/38502111280.pdfIn PDF document text
    • http://jorakaygame.com/ckfinder/userfiles/files/89812381836.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/11297720255.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/furalubifaz.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/tilub.pdfIn PDF document text
    • https://birudongker.com/contents//files/59111799447.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/5418ca1bc2f1a246e40895c0073d45f5/posozizixum.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/refijowixamodogikidekoba.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a7b0b5e23---xeliwasepelipekepo.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/6272360962.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=find+the+axis+of+symmetry+calculatorPDF 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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 11036 bytes
SHA-256: dd9082ad170b7d5d30e3a18bc251e75e4aa853efeecd4c775068193177399e17
font_02_sfnt_off0001127c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 17652 bytes
SHA-256: 3f462163577f4b360b45841c114f6b84ff31fbf3388e33169dad44afb811b665