Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e09982d6b7d4893…

MALICIOUS

PDF

86.0 KB Created: 2021-08-24 03:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 78557db483af53158e94d4292d7f33e6 SHA-1: df23f2b1b07aef19bce8dba1fcabf75155e6fe5b SHA-256: 6e09982d6b7d489399367fee97de3af3c9eafb6451060428f04a1ea83e6f3aa9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to other PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608907565ec22---92240596935.pdf In PDF document text
    • http://csc020.com/userfiles/file/20210728010656_cb4wvi.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/47256616691.pdfIn PDF document text
    • https://mimpidia.com/contents//files/meviwivapetoninijitugum.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/tadetuwe.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210623_DC90E07F264A75EA.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/8936eedf04027decf7b8bd7e7709a0f2/binafevizat.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd270b5cc---68512688271.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/86088169052.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff5a5133f---jaludemazufatel.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/79811406329.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb69748d2---43330146985.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/mizuxipasewad.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f4d15022---zedagaba.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f7d2401fb577f5a3939ccadbcbf3469c/1392800825.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a8084d53373---firavetatudugejepu.pdfIn PDF document text
    • http://rc-modeller.se/images/file///detiluke.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/silumavug.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b805975d1---duladuzamasaxumovetosu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca02370f8c4---muzedijobuxenajotasuzifum.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/ginedot.pdfIn PDF document text
    • https://plasy.com/uploads/file/76126855672.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c121ec98361---zonok.pdfIn PDF document text
    • http://elitvorota.ru/f/file/65801830299.pdfIn PDF document text
    • https://stvorki.ru/files/file/pasilobuduxeb.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc1d41bd4---5345266820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=epson+scan+multiple+page+pdfPDF 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_off0000e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92F 10948 bytes
SHA-256: a7918ec5989581e4c58624200379c427a5e6a7057f3a35e3b7c00aac2bd300de
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 17536 bytes
SHA-256: 63a694408141512f55373ec495626f81306603bb26766a88ac10d954399eae91

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