Malicious PDF — malware analysis report

Static analysis result for SHA-256 db505bdc8c685364…

MALICIOUS

PDF

74.6 KB Created: 2021-09-17 01:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eeba89874bdb1a5c06583e57477c074e SHA-1: ec44625d7f9b3bea7bb249d7367bedb2f309627b SHA-256: db505bdc8c68536477b48334bee1658e21d0e200c562d20895a9ae1ab445c8ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://gadapavimenti.com/GadaFiles/file/firokoparuvaru.pdf In PDF document text
    • http://lamexmarket.com/uploads/files/kaxepuwasipozanidobam.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/suririmotif.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131706cc80ba---tulirubidufaratafap.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/zaripevotogul.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136324f0378e---93873971523.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff99da660a---36765939699.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/bumidefexutokozarogejaz.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/2192551253.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/1543656542613aff97af3de.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/65682557887.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/3542816320.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/ginubeboxora.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/90292993032.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/zenavag.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/74040941183.pdfIn PDF document text
    • https://chineseclothingonline.com/File/tutenudubowuvugajotadebor.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/xizebesajenaremas.pdfIn PDF document text
    • https://ferropula.hr/files/47785185664.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/50989691436.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/rogizetunifokizipijokisa.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210903225352.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/12169565412.pdfIn PDF document text
    • https://attack.lt/images/files/66182369417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=sohni+mahiwal+full+movie+hd+1080p+downloadPDF 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_off0000b9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D4 17948 bytes
SHA-256: ac44edda97e704df96020e1d89cb029c24b9bb11553378ac6e82e82325ae4ee1
font_01_sfnt_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 11108 bytes
SHA-256: 1aa457ffbb79fd5f6159c844140f306b496243a7138997982d85aaccc6020532
font_02_sfnt_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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