Malicious PDF — malware analysis report

Static analysis result for SHA-256 208046ed4dec3c86…

MALICIOUS

PDF

181.8 KB Created: 2021-06-25 12:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7895f8856f97ad3efb954708f7dbdc3 SHA-1: ae4b1672c706d3ab203b1eb40d7b1b8e96c3d1fa SHA-256: 208046ed4dec3c866ba79633d00254e8358694e3b752cb52fb402e4476d5fa4a
236 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, potentially leading to compromised WordPress uploads, and employs social engineering tactics to trick users into installing browser extensions or updates. It also exhibits characteristics of an advance-fee scam. No scripts were extracted, but the presence of numerous URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://baraanduliaptti.org/userfiles/file/fipimoz.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b72af010f3af28565567894eb82e2212/24939428444.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee87010ab6---56220045778.pdf
    • https://cgeminfos.ma/upload/file/xevasigawet.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a0855fe0---21714310883.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d34bf37051b16318a4436d7c867ac994/jolesibanufepogego.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a90cd1ecf40d09fe78290d0167c3e25a/jinusanadewavetid.pdf
    • https://tavio.ru/files/file/23929989927.pdf
    • http://mdc.ir/ckfinder/userfiles/files/22196216762.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/95j26830i3j46gja5vfjqro2p5/sifokalo.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad9d4452e1---wenanaxukifazezomezawazan.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8a11f030---didevifapesowevowanezud.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/827a3e3e7d732ee58f8a832a06cd9910/dafilimegajaxaxererad.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fef0e88762---66389083099.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb9959e6d---berisavalibunesavuxak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=hydrology+and+water+resources
    • 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_off000268bc.bin
00cbd6df7c98ad9442bbdc5115927bf0eebca3cbd655f699a0765823aad34dc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x268BC 10744 bytes
font_01_sfnt_off0002816a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2816A 16792 bytes
font_02_sfnt_off0002997c.bin
260e53684021130f8b79fa7612ba1c3eaafb738e9fb910c97feb2acdfc4b5818
pdf-font-stream PDF embedded font (sfnt) at offset 0x2997C 19272 bytes