Malicious PDF — malware analysis report

Static analysis result for SHA-256 84019f91b459518a…

MALICIOUS

PDF

115.5 KB Created: 2021-07-05 02:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3314a30a31631191650f14975b749716 SHA-1: 762cc4abe4962b386f1e45bd5391b301b8e5023f SHA-256: 84019f91b459518ad8c9b5f82239430a687390d57f2b9f48ec965b754319f87f
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the document structure and link farm behavior are indicative of phishing or scamming activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 7

  • 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.
  • 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://szud94.hu/img/sajatfile/files/najuwugowawixatibi.pdf
    • https://xn--nmqu14inmf.com/upload/files/vosotolefemuxozesomavopa.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/551f06a34ac0e45bf5eb3a9adebbe824/23234552998.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e2b148f4c8bc691804da56c08f6e85fd/musof.pdf
    • http://ampletrekking.com/userfiles/file/kezuvoni.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/14a4a04986bb56363629fdeb3c0036cd/xuxatatibuxesupawa.pdf
    • https://emmaushuis.org/pages/tujavekovavo.pdf
    • https://bloomeng.com/uploads/supidovov.pdf
    • https://kidneystonetreatment.in/userfiles/files/zizenuneganejipopiz.pdf
    • https://arzhosting.com/calisma2/files/uploads/wozazogafefenirividivevog.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3a0d0172d088c496fbe4798d0072289b/rojomege.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c993d271b4---muzixagazamojalef.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/furegolusorazubikot.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609042f810e7c---24536119962.pdf
    • https://actorconseil.com/files/file/rikigujonojatonaxavebuni.pdf
    • http://szguilong.com/userfiles/files/surutelomofexufede.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/k9k7n893krqak0689qgbo6d7p3/59709042592.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/79d92b1ce2c24e42747146497d96d11e/wefegowox.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095dfee98ebe---25823435782.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/f47334648446c82d84dc88b733e283b8/wikemibodanobimuxe.pdf
    • https://broadcasthub.com/ci/userfiles/files/neranofiwuniras.pdf
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/jimevujuzonoguxamexoxa.pdf
    • http://martonelektro.hu/files/file/gojisemufixiwov.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a716094ac3---motux.pdf
    • https://cardion.dk/gfx/fckimages/file/69791372840.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=project+operational+manual
    • 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_off00016383.bin
5a0f72bb9f1038ca0c0aa08cef0d4451f1a2bf6c89a76b5bc89216f6fb702992
pdf-font-stream PDF embedded font (sfnt) at offset 0x16383 17272 bytes
font_01_sfnt_off00019089.bin
def05f4c882dfe10435f4ceef80181ed0f417b94aa0534772133c335c249b3c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x19089 10600 bytes
font_02_sfnt_off0001a8a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8A9 16792 bytes