Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1e8bb9dbf53c68…

MALICIOUS

PDF

128.4 KB Created: 2021-07-18 12:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 38e6cfa7cb6e63706c182e78ec50db2d SHA-1: b0c095c65c3a52d58c3793ea26224f92458a47fe SHA-256: 4a1e8bb9dbf53c6837381e791159ce061da439bef043a79509be6f62ef872776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of external URIs and the nature of the link farm indicate a likely spearphishing attachment used to lure victims to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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 https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d192b30c34---jubatasazegegorulidum.pdf In PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75126da354---mujuwamav.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8618566c3c---tupeke.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/9c67f9580ac47c358530170927a09223/74809971660.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/kurapugogusitalose.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/5e66930c11329ce8da732a2ffef1e382/rigutenifarirojeferunigu.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60d59cc797297.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/62068870422.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/ecc8ab98bf2202bfded6bb29197dd342/93778567238.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/55694259883.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/60331112630.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/dipakivapukuxanopuj.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/bkk0qs01jcn9v4kpg5ju975thj/nuwiwame.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/udpka0eafc9m05ufhars8duqg1/xudiwotiwalap.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/97423448803.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1623069909.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b8ef15562---94614312023.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e40597be0---79045960595.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a509f8dbb0---fisadiji.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608695f617edf---dabujixo.pdfIn PDF document text
    • https://ancoraeducacion.com/images/37240659082.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/d00f0f1629a547a4ba2227659923a88d/33223499059.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebb8a1c908---wasumuvilotegawiv.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/20503325834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=left+handed+theoryPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001c5d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C5D5 16244 bytes
SHA-256: 9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf
font_00_sfnt_off000178ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178ED 10216 bytes
SHA-256: 8f6b199bd47b12ffd3cd52a14854596683d75f8ae22165d3b0bd83e469e2f202
font_01_sfnt_off00018fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FC7 21600 bytes
SHA-256: 4765104ab08137a139d71fe33f824e36269ee823da047cae9be3a899f8677142
font_03_sfnt_off0001dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.