Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2216a56bbbba0f…

MALICIOUS

PDF

93.4 KB Created: 2021-07-28 00:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 94bfb5fba3bdccc8fbb9c824c313d275 SHA-1: c52f8c7f08b4ddc66920903e79915894808dca80 SHA-256: 8f2216a56bbbba0f0a379f725eae1eddc7cdef7de7490aaea1854176892bfadd
196 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites and other disposable hosting, suggesting it's part of an advance-fee scam. The document body is heavily obfuscated, but the heuristics indicate a lure related to parcels or prizes, consistent with advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5c6e1a52823e8e1980d00804685ae9c9/nalojajanekutu.pdf In PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/90714255436.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c0be4272016777a0157a281b1839fd91/ponipumoweluzu.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/xetaxijipinev.pdfIn PDF document text
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/dibota.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/14966695096.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/patijexazexak.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faf44052fac---17433424176.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fda2ff7284667651a4cb6748c2a72ba6/wimozajalojodozazasoda.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/362c0a0c9ed950b6bb4f5294f0b2557e/75975640541.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/64744345284.pdfIn PDF document text
    • http://princeverma.in/uploads/files/60034033926.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/69142a9891354d07778c0aab401e30fb/lenapejutep.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/fudak.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160994e207180c---pabubetujokewoketepibopo.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/72131b01a0b3f18292ff8d41df5017a3/16227192022.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076bded6ca85---fixavizanojesakipale.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/wonajupipuzitomugojud.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/453rb2ureoguoj2efqu32dhvnl/kujorozetinubufot.pdfIn PDF document text
    • http://abnicum.com/files/file/xenorapuwevuwakexepat.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ee2560d9---57675934323.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/0c9672e094fbd21bd7d3fba791cfebde/sewatanuzapezowufajumovi.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/nuvaduvexojupivawizekogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=night+chapter+1+study+questions+answersPDF 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_off00010749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10749 11220 bytes
SHA-256: 037cfecf3da50616a06025da5cc3b53bb26abbff5c8685239150f5c4000eb313
font_01_sfnt_off00012134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12134 17756 bytes
SHA-256: dcc5bef0e418dbea438e74a653741d90b6d78671043c85f61dc757228c28135c
font_02_sfnt_off00014fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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