Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedd655391e90ad9…

MALICIOUS

PDF

113.9 KB Created: 2021-07-31 03:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ded61bae28c18614afc89153fdc9a6d7 SHA-1: 29938767efbcc72855e4c05a2b0e0be22b12db3e SHA-256: bedd655391e90ad9293be8cec31177e6c2e6defa107f1e4d7c4c6a406d131817
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the presence of multiple external URIs and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://barcelonacentremedic.cat/files/galeria/files/deperiva.pdf In PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/sejosavo.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3861ccf04db9d2c21e56aee516a2361/51417911432.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d172e08112504282956b62f015d7033f/foromijalawe.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/ninepudepumilezibez.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/71682879796.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/fikuzi.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd25e6ce6---1837625657.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53d8c37f85---37902575694.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/12638208535.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c72e405c92a1bdc1fa142a8d75f4f1be/vamudejolefokesuvuf.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/pejumutovawok.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/e6fa79c10dde09dd7133c5a46f2fda80/38451413341.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/14434187130.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/jufukodabevewobimamibafe.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ddiiipolh2e2a3blcbgiquvkv4/tirofasewi.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/37870690162.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f52015268---mininelile.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d22b25745c46b3acf33733e290b19e56/24300253361.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/66583015393.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/fadagibikesutosesogep.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/78596874561.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e3105177051---44110004212.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1096b9a33---79756946040.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7b38a522b806e7af345f86948e8f8884/kajexix.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160fa21a55d948---80109814237.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=hipermercados+tottus+consulta+factura+electronicaPDF 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_off00015722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15722 18148 bytes
SHA-256: 60242bb854a7415115b69b71ba4d4bf8ce4e9978afdeaef010866672b3f02d60
font_01_sfnt_off000185f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E0C 10872 bytes
SHA-256: 7d0392b4d63e2e448a0032c0e6f61b072881f81f188db0555c7834bfe7defb01

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