Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e63ec0e85c74ff6…

MALICIOUS

PDF

133.0 KB Created: 2021-07-06 22:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 9ca31d18378b5e9fa0e40c4fb5abec3b SHA-1: 61db5a0cfb4629313ba6b24872811a48dbbfda6d SHA-256: 8e63ec0e85c74ff6261d8ff0b0451a9dd333879357d74c99589d785899555e42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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 http://merlegdoktor.hu/tmp/bowepagegaxakidaku.pdf In PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23522526356.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609650f2bb474---felenesuwo.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/9f43e2c93eb8c4ba70436f66ee8af4e3/75555514222.pdfIn PDF document text
    • http://jarosi.hu/files/file/besafazivutatibexiziburi.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9061eaa1c---8067131675.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2aab3a01e---moligigina.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6c4c1dfad---gutuvuxomowiruz.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607eada491ea1---67976841586.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/25810866427.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/bth0u363bmmfvbmstvluteuvd2/44129226463.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/46085651592.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/b77ecfbcb934450aadaa303e2f03914b/xudopix.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/u1qogiratr5pidpr1eplg75ps1/87138025744.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/evrj8ifefmuinfbqe0892phq22/rikeviwejiluzujog.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/gixosalitisanenududil.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/wasagudanajojiwivad.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/dobametipibu.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607666bad4b10---todelefaxota.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/15380631562.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/76128994969.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160789c55e3e1c---kadejijomusugirolumugez.pdfIn PDF document text
    • https://hirurgija.me//files/redoledapus.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/66723184589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mechanics+of+materials+8th+edition+solution+manual+pdf+gerePDF 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_off00018ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4FA 11368 bytes
SHA-256: 059274f40614ef80559f27838a21390f5d33f09166c994928b488930ebeccef8
font_02_sfnt_off0001bf56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF56 16200 bytes
SHA-256: 537833ddbbf0cc5d3ec83be072674852dc8ccd34d2080b46a90ee242da4d3725
font_03_sfnt_off0001d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D50E 18556 bytes
SHA-256: 35f4f51a1b16c0008e9eef6f0f93a65c96571efa4602a41a35121608e8dd607d

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