Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0abb27bdf15a2e…

MALICIOUS

PDF

86.3 KB Created: 2021-09-08 06:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 042c7058d77a7d941a9e136b53ab0857 SHA-1: 68e15e41d1e1b638f91d2b5b14cb65716150109a SHA-256: 1d0abb27bdf15a2e84a8932cdfe2da305aaba2e125fc62c88ec951b4e6097b56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. No scripts were extracted, but the presence of numerous external links on potentially compromised infrastructure is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077e4afdc846---novuviwivudaditiveleje.pdf In PDF document text
    • http://posekatzahradu.cz/files/file/17210485003.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/34427519165.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf4dc0c60---roxubobedovazirapiwifol.pdfIn PDF document text
    • http://yarpaket.ru/userfiles/file/63377082702.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/biwaroxinesuvinuburokenen.pdfIn PDF document text
    • https://mauspro.net/upload/files/46193521239.pdfIn PDF document text
    • https://sayurmateng.com/contents//files/gogudetamujagej.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a6540f94eca---23063116442.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/35922528288.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/verajezepudan.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/um76ojvgr22t7dfk79scodfajg/lezanokixepasalukadepizip.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c411dc992a451a241f4d254106e4b22c/16329949001.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021073000581073499.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/bemuvudawolurisu.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/taziwe.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/jipeniragopirido.pdfIn PDF document text
    • http://e-district.org/userfiles/file/61844698246.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaf1105d93---fumobulazuxofel.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/notulitilewobopab.pdfIn PDF document text
    • http://join-angel.com/ckfinder/userfiles/files/81266283931.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090a4783fb2b---wovobukek.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/51110113654.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/matumi.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/81397057720.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/667fbed0bd39804c78cf9031d768c274/guwosovexisodumezila.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+talk+to+someone+book+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_off0000eac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 18532 bytes
SHA-256: 5453f15e31d1b292a080c7234d696c86309cfae595e7da0f1f9acf794e7409be
font_01_sfnt_off00011aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C6 10776 bytes
SHA-256: c966314051220dda4aeefff7308b7ba47f9cf07b93262da871e927ff0bcd598b