Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecd83346de5680e…

MALICIOUS

PDF

84.1 KB Created: 2021-08-18 10:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bd64040e95edb3288f72e46dea5c3cb3 SHA-1: 72b7fa0c2618957c059c7253775b537948759b36 SHA-256: 1ecd83346de5680eec94c02b95bfdb4fcc3c88b57b521e02608900fc0bba3c98
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, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links points towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://pixomot.ru/uplcv?utm_term=substitute+for+buttermilk+in+recipe PDF link annotation
    • http://aj-logistics.com/stock/userfiles/file/24207907309.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/49d7c8d74273f8415536da72699cf914/befof.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/53131105303.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/85715282628.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/77ed93718d6a2892e5ac12845dc86980/gopuzalekaxix.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f3c233fd8---walorejodalatugokalexan.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780b38b9332---janazivapokozerejan.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ae12acecf---nevegugewunozakasafe.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca318b2c82---84351823047.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/35bqvjo29hog1d6hd4gtcm9ke0/jawuboj.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/36216773964.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/8694020660.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/16/file/20210516_033152_105.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816b65e161c---zudizizavolamoruro.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160da8a37c78b3---60577889962.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da104bc521---bizulejilajiged.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/vazewusas.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0ef9f231c58b5a243bcb14adfedecfbc/50622642592.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b11abe06c490f130733f5d9561236446/jagatikivulilufokajobiwe.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/47748280948.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/abc594ee1e61b137459cd7b47f2ddc3e/vezogegi.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79c1b74e9---67286675257.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16096603d6f9c6---patadudakonijet.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160882cd02673d---jazisesisoxexifopoxare.pdfIn PDF document text
    • 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_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 17436 bytes
SHA-256: d2cf4868e1c98473e6d7d1745fe4f2180194c2bd935b29ed68c21c9fc94009ac
font_01_sfnt_off00010f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001272c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272C 10888 bytes
SHA-256: 701e7ba73036fbb9667b081ca376a83fe07938e5756841ce1a93b4429d3fa2cb

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