Malicious PDF — malware analysis report

Static analysis result for SHA-256 67aaed053512e2f7…

MALICIOUS

PDF

96.4 KB Created: 2021-08-06 23:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d2fafc249d6ab90c7d243227a3f830c4 SHA-1: 4a7ce2a5b79abd439c5885e276edec2cbf613ccd SHA-256: 67aaed053512e2f788170054093563a22a976c40edbfd8f69db2c41b1a836e7e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable or compromised hosting suggests a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c628a43194---xolofavevupavipelatavif.pdf In PDF document text
    • https://lescourailleurs.com/upload/editor/file/juzesawoforudadi.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082c6dba8fb1---befizivejusilanunuxufu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2a7cb2e7---xuvodoka.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/97323165179.pdfIn PDF document text
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/7660690703.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092c0cf85bfa---woneja.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/lemuba.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608768c56ce6c---75604691250.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/66412149462.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/4401562612.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/81097638047.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/8f67e27c4f853fa167acc95168f6f3d1/vodakunatevudeb.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/daxolulunutirobuk.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/5165fdce34c3e15ead0669ce27fb62bd/putajozorexejikev.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/75jrpctmr1l2ov1abfmuub98cl/waful.pdfIn PDF document text
    • http://imaginove.eu/data/Files/wazutunomeledutanebosef.pdfIn PDF document text
    • http://cgeminfos.ma/upload/file/36654580034.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c52b3db0cd2---noverot.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210613224805705.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b23367b85---jabinosomijevixusod.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/rufepotelabe.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a8acbf4f2fc3082b74fc56115195a9e3/vekulemabagexejuliraj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=harley+ultra+glide+accessoriesPDF 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_off0001147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 17984 bytes
SHA-256: 0e26e008b124910d798b0ab30e839b33fe32c7d9db3b4832911f08ef695a1010
font_01_sfnt_off000143bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD3 10648 bytes
SHA-256: f6c6c9c4ac39c418b21236ebb72c84dc05a4d558fd2704ac1c2900146c4602b2

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