Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3fef5b7cad9701…

MALICIOUS

PDF

80.9 KB Created: 2021-08-09 14:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8e8af5d82a542a86714b354091557519 SHA-1: 239e58379a295cf02d29192b16d84d898830303f SHA-256: ec3fef5b7cad9701974093024d793406b0fe79cab2d247927b8d1e6bd9dd9e3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous external URLs and the nature of the heuristics strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traveletrust.com/basefile/traveletrustcom/files/72087880904.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/tokujr6a56o0hopjng9e5kvbig/durizara.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/47f7lu9uknurmtnq24rjn4u75q/pawiwideserafa.pdfIn PDF document text
    • http://hyundailed.com/upload/editor/file/zemobevajixijuzozoxa.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/1a8b401a4c4a4760dae9236a5e5723f7/nokibuzarixetasekipe.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983b6ba066c---jitabogeliw.pdfIn PDF document text
    • http://stylekd.ru/files/zovufizedeb.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/a3b3a33793cfe7b05a031d32d8942fd5/36429860246.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/merik.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/41822337883f769d94581022c5bd301c/16066280270.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946d1f6c36c---94468634585.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210702_A6E34AD7FBD38F56.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/5af262feb9747ffa55a6060bf8148fce/fovejapipokufu.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/24995069266.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/wonewidofizi.pdfIn PDF document text
    • http://954move.com/clients/4890/File/rawagategiruzuju.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9747d9785e---selijokavikiza.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cc48dbc06---romijogusemapixupix.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/dejed.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/mivirujezuko.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/nexumumiwubukidipinanitef.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/folewuzimajozimesaxosakil.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/99805736087.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbfe15135a---viwatarifej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=burrito+bison+3+hacked+unblockedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B9 16304 bytes
SHA-256: 72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee
font_01_sfnt_off0000d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 11024 bytes
SHA-256: 6603d4039d1cbf30b7e03d64a400ab9c1633677d338886a8187651e69e8798a1
font_02_sfnt_off0000f052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF052 16552 bytes
SHA-256: 1b4876109a503df30178e0fd8e58e9b08a73dc8416c12c21bbe45fc77f2badee
font_03_sfnt_off00011b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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