Malicious PDF — malware analysis report

Static analysis result for SHA-256 25aeb8c2a67baf63…

MALICIOUS

PDF

103.9 KB Created: 2021-09-19 00:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ace98d9dec62bf3795baa77d08203b2 SHA-1: d807b62b5a9ea85b567fac170184cc08a3227ee3 SHA-256: 25aeb8c2a67baf639f8938c51a71ae62473a9de75a0a6150fc5fc6f5fd06fae2
176 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, several of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and does not provide direct clues, but the heuristic firings point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://clinicaveterinariaalbese.eu/userfiles/files/sukejopezutipavex.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b62e16a1b---logekijigorivimuluj.pdf
    • http://paolacaone.eu/userfiles/files/tonalozuvuvevitukulolenam.pdf
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/dabonuwa.pdf
    • https://firstview.christoff-design.com/files/91174582711.pdf
    • http://studiozoppini.com/userfiles/files/rapix.pdf
    • http://paraglider24.de/pics/fotos/1/file/xadara.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b43981e84b33ccccac56bb3b0678a8a0/75539314050.pdf
    • http://srtprogetti.eu/userfiles/files/nesuboratejanu.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1f042118ac670e2532d296c4dc7c27a3/mitovivedes.pdf
    • http://machinesupplier.cn/data/product/file/2021918_211021_369.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/8f4rnmhuh6ed304j88kqvv4fte/319375852.pdf
    • http://lynhuagiasi.com/Images_upload/files/9655351948.pdf
    • https://thietbivesinhanhhuy.com/asset/files/44685237774.pdf
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/jonatukupoz.pdf
    • http://boki.hu/editor_up/69561783476.pdf
    • https://terminarz.online/kosmetyczka/krakow/files/fubasesebejalolaloraza.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/4a07b41e692a2b5dba3072b4ccd53513/71720477694.pdf
    • http://hotelbelleepoque.bg/userfiles/file/60942987033.pdf
    • http://esistore.lu/userfiles/file/58188961481.pdf
    • http://bagiez.com/userfiles/file/15919620007.pdf
    • http://capmar.eu/userfiles/file/57451526939.pdf
    • https://mallncart.com/userfiles/files/nipowivasepasafufiv.pdf
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/zigesumukorejesevanup.pdf
    • http://chiesamadremarsala.eu/userfiles/files/61745137042.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=thor+the+ragnarok+full+movie+download
    • 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_off000130b5.bin
78ea78e5db5e440d95de75736514a6f1ace421439549fba073ac9154728367ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 10940 bytes
font_01_sfnt_off000149ad.bin
438e8a2fa21f4269d3a61aeb9af31f8509bf3daf1fea216b85bfd68377863a67
pdf-font-stream PDF embedded font (sfnt) at offset 0x149AD 18272 bytes
font_02_sfnt_off00017922.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17922 16792 bytes