Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafe587fab718397…

MALICIOUS

PDF

76.0 KB Created: 2021-09-06 09:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a6dbd170f62be44c5accbff88a522257 SHA-1: c577c6a29b548e3fa359448e9095bf9716814317 SHA-256: aafe587fab718397ed4755c84014d2505b8a283761916816c1a677dfd9d0337e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting. This structure is indicative of a link farm designed to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://wastran.ru/uplcv?utm_term=gala+gujarati+to+english+dictionary+pdf PDF link annotation
    • http://prttour.ca/FileData/ckfinder/files/20210613_6259D08DF5DACC8D.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160763c7486e1c---77012555405.pdfIn PDF document text
    • http://njchemland.com/upload/files/mekatogobateluvij.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/galolijisamuxol.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ojtr3quriodgfucgimk65stagp/35667639639.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/vupasixavakug.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/jmdrn976a5shts6nr5ebh592o2/kudugofobinofapajetoxeve.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/8043724630.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/79994636289.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1610e850ead1d2---raturojivunixolisa.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/55ec1813e5c09bccf4ffb1e85c91f246/fazabofemazapol.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/74423147337.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/68091936679.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/94844427766.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/domifadipuxir.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/85403519123.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/84405682378.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/40416234648.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ag8d20pilvscer419gktsp5p39/wilakifuvumofubawokokem.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d72c6a04aa7b82cdd42d1a7de6e0a0b4/mogerijiraperu.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/larigapinukaguwasaginida.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/74315590837.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e739d71b4---vavixiri.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/50690486124.pdfIn PDF document text
    • https://europartner2.pl/uploads/bodutevolabaribejiwob.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/jesupeludipetipozezili.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_off0000c062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC062 18260 bytes
SHA-256: 4dfa3360ef5ff56dfd0785e3b07f4cce7794ad70c3430e6abd9d6cf35bd07068
font_01_sfnt_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 11280 bytes
SHA-256: 1bb83318a96e740e88aec1949c5e7213bab64b21e531a158846dde0cb93d5c55
font_02_sfnt_off00010a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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