Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a557c19294191de…

MALICIOUS

PDF

86.8 KB Created: 2021-07-06 05:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3c5f04c4fbf98926946551ede737349 SHA-1: 08e13adc226791d5aabf6b5fcd1f65d12cab1602 SHA-256: 5a557c19294191de7d889c5d66f16ddc0f5710e7a004054411430190773f7050
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://rollfactorytogo.com/uploads/files/24746903917.pdf
    • http://augustaelectricalwork.com/editorData/file/47370800514.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794eb56c88c---bebobujoxozinopojuzinane.pdf
    • http://drivingschool-brno.eu/files/97747930804.pdf
    • http://files.ibiza-ferien.de/file/dupisijuvijukifaluruxaga.pdf
    • https://rajaunited.com/contents//files/jujerulenobomukemixaserop.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff2d2186df---lirolijobafu.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd9c4ecd9a---petadarizamuzakagozejus.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/acfe7aa5f11228d4f73765a032b6d03c/57334880698.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/0dce2656cefb2b34030faa6a6e4e4ad4/3867487710.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/1t68sqfmuf3q1o6svattsl7rf5/63517174886.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c11b1191c43---vedofudunoxotorawa.pdf
    • https://rimsball.com/ckfinder/userfiles/files/vojasosavar.pdf
    • https://juhaszautovill.hu/userfiles/file/9543151241.pdf
    • http://happinessgown.com/upload/users/files/dokugekiruwarodesopizebul.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608981323f9c9---68185037290.pdf
    • https://www.carrentchiengmai.com/files/96308067712.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/7c611c9a1f073cdc0f7738e0cf412fa5/9051486692.pdf
    • http://sungsam.net/userData/board/file/62870518028.pdf
    • http://aj-logistics.com/stock/userfiles/file/35734815017.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/573491c3180421b2ba8043ee4b8511bf/zanamebajazavobuwalozikiw.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097731b5a232---44816550285.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c16270b34---87581571301.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609c44e6744cf---31646187682.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/bf6596e08f8f37bd268f205bd6470991/kinojolisa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=give+an+example+of+how+you+set+goals+and+achieve+them+answer
    • 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_off0000ee03.bin
f5a93bc7c5544789b106ec71192f1c8d6d924d597d94d61cb36cf73e826a7afb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 17012 bytes
font_01_sfnt_off00011a28.bin
791ea61fcf48757c3806e6256df0b2891d92e3beb599bc8487779ffd5c251acb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A28 11576 bytes
font_02_sfnt_off0001355b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1355B 16792 bytes