Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b689564d70a521…

MALICIOUS

PDF

88.0 KB Created: 2021-09-01 01:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b830d864c150fdc85fa5e7c6158c1db8 SHA-1: 5007d2b9db35df339913cf7b6c155ed0f0547525 SHA-256: 10b689564d70a521b968093bf295a274cfb7aa4d89e51bdfd3584bf3be0db175
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress upload storage or disposable hosting, indicative of a link farm designed to distribute malicious files. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into downloading further malicious content, likely a payload, by impersonating a parcel delivery notification. The embedded JavaScript is likely used to facilitate the download or execution of this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dukra.sk/editor_uploads/files/ginelozunuvawowenuwipad.pdf
    • https://jagamimpi.com/contents//files/deradidogibo.pdf
    • https://bawwabatrizq.com/userfiles/file/59313209635.pdf
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/44835710613.pdf
    • http://pappteam.hu/userfiles/file/58835685655.pdf
    • http://www.tsahimmongol.com/uploads/images/files/palafebirifezulu.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d628841d5---xiwuponesek.pdf
    • http://rainbowcaterers.in/userfiles/file/revibasodu.pdf
    • https://pristineleather.com/userfiles/file/13435650378.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072c7dd4b9b8---33723013755.pdf
    • http://finalstage.biz/js/upload/files/20373497390.pdf
    • http://acudrved.com/ckfinder/userfiles/files/litovobav.pdf
    • https://medtek.vn/storage/file/kunufolusojimiw.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb91de7f75---kilujitavulavokalulomanad.pdf
    • http://hcvitamin.com/webroot/img/files/22687850396.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160916e4065593---xisatad.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5e95eaf4---sidigoke.pdf
    • https://panoramabyty.cz/content/17017832987.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/k5s620m8jq3u7ucuiio24de766/xivakazulusufefedofaxiko.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ttvt5bpce8k17pdj6vulc2n6s2/dodori.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d2061eda546a888dc63c8a621f979edb/25743029337.pdf
    • https://odlingfamily.com/userfiles/file/57012188031.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1931b0de0---katowunobufadosa.pdf
    • http://omni-links.com/images/blog//file/vefixopal.pdf
    • http://stark-tools.ru/images/uploaded/kowemubuwe.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/4or73jus46k3cvfc34m6ji4av3/gegubowava.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=aedilitian+remedies+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f158.bin
e51d4d65778e4194a94f2e6d47e8dd43131f7e30fa9e91c9d3ab381a524450c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 18616 bytes
font_01_sfnt_off00012290.bin
df87d029f92c77de1a56d871254103ee89d0f8c039d3a7ac3c2f0688913c5b71
pdf-font-stream PDF embedded font (sfnt) at offset 0x12290 10452 bytes
font_02_sfnt_off00013a05.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A05 16792 bytes