Malicious PDF — malware analysis report

Static analysis result for SHA-256 171e63862bae702b…

MALICIOUS

PDF

74.3 KB Created: 2021-09-05 04:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aacb0cdb4e7f576a2085798cbe916e9a SHA-1: 8c6b80109f789ffd69281ff4fff339a52005d190 SHA-256: 171e63862bae702ba7596905fdc3b7af9f86dd6d1ebb6f0a8e461fbeb34c8969
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to PDF files hosted on compromised websites. These links likely serve as a lure to download further malicious content or to phish for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://sciattella.net/images/file/79921828450.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/74b2de7b6030f10187920c2c26072636/zavajoxir.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/26959750114.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/20e550166be66bfbc20bc64087e9ef52/lakituzowus.pdfIn PDF document text
    • https://proxus.nl/file/46752288804.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608447acad286---84025923954.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/40431042643.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/wufesakunomezitixovogabig.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16117e9b160f3d---xodogebutuzuzekujasepix.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/fanelidi.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/vibelekat.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/vefage.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/mofadinafiv.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160af97b96776c---tupelokigawurojixibodip.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/77ce9f0591515c684c007f204922c6e9/39759982008.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abda6cad074---mefiwewoxepi.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/31859387289.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/jita9ru9f3k7ghq5glab4uqi56/dabotefeduwep.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/penumijazowedozom.pdfIn PDF document text
    • https://afayl.com/userfiles/file/jadifotevoturexutumoz.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b85c25abc---44674275760.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=maths+reflection+worksheets+ks2PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC026 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83D 10724 bytes
SHA-256: c5abaf4dc0488ebb3561d8c07ad2953e1b5da47bfffce016663d4b34e013a4d2
font_02_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 16736 bytes
SHA-256: d427297a00dbf7a51e2fd520bdd52e70a9ec2a2b717bfaf70d111aa9a4d98897

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