Malicious PDF — malware analysis report

Static analysis result for SHA-256 05907d05be54d5b6…

MALICIOUS

PDF

83.9 KB Created: 2021-07-02 13:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7e05ed27cdf9ba9efd222d2e10c6583e SHA-1: 116989ed315775ab3bda473b587a0d33eb54989a SHA-256: 05907d05be54d5b6f9f03d3fb4916543b851c1bafd459db444e1eb0c4d7b3f35
164 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/71a2cf2c9a6ade21da1537214acb3278/guwavezijalo.pdf In PDF document text
    • https://mimpishio1bet.net/contents//files/kuvutedejimibekifotig.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ada531652---nepoduvafawom.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d541e10841a5fa17aef3f4789074e8df/47978566139.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/6k18ffrapp38h0smm3mf2ons0o/84918182237.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/nunejivawapan.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/vafurisizalezanarupusobi.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607507834e928---31165446985.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160adf4490c688---36941102758.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/rowugipadasaf.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/40d3c687030ff128c85440f079f005b8/zarivovida.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea7d8b8b9---kafujopetodosijofipuj.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b48e35403---55344279870.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/33de83d73ddfca9c96a7e1477740b202/rakenononikajetunol.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/ae3e5f6cd96036eab44aafbe4f9c3c16/fafejexilokutotadubawujeg.pdfIn PDF document text
    • https://hse.tw/upload/file/totemubobukopesilozape.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/661e2726c7ec61b4aa1ed09ded703487/soferetupakelubibebizuve.pdfIn PDF document text
    • https://lapiadinafelice.it/file/80543208130.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/kubakowavefitedujajol.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb4fa22a12---zanalusifeme.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/mikeku.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5e3d24c10---66349459490.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4adf17c391e7aca8751fa588501cdc52/67008386897.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/0606e13673246d9d0920cc9eba54a2ee/sekedetozidamolok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=our+god+is+greater+micah+stampleyPDF 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
font_00_sfnt_off0000ce48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE48 11096 bytes
SHA-256: e1baf16f441b4cc908d115b4f818e29f711f13907ec3db154eee172116560537
font_01_sfnt_off0000e801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE801 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_03_sfnt_off00011587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11587 16824 bytes
SHA-256: 168073b5c34847913dcb65a3af434a03244079c2011b2acd0a72c8d291eb1d20

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