Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75d49aa7e5574f9…

MALICIOUS

PDF

83.7 KB Created: 2021-08-19 10:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 54877a05220f906977d379530f399028 SHA-1: 432c76ebdfee68d89156970602db808ee210882d SHA-256: d75d49aa7e5574f90990a67c40ad972d526b67bdf6d2843ab2cbcefc5168d1bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier as malicious. It contains numerous URLs, many of which point to compromised CMS upload storage, suggesting a link farm designed to distribute malware or phishing content. The presence of a URL with 'utm_term=adobe+photoshop+cs5+full+version+free+download+with+crack+for+windows+7' indicates a lure for pirated software, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4340dc4f9af41372675228657f8b0a4b/60098115745.pdf In PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/egmorint52v4f7e05n3lj42ndp/26662305972.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c019501c9b44bf7fc9031c43a7256079/lukolaxekikimemepuz.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/lasez.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f325031ae48---lofamegujolerelipubexibu.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/17000075211.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/82405943821.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/kodomotuwekuxori.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c26e8acb753---45070477572.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/99882916574.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/nojelomenawetoxumalaxarog.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/duzikijubosege.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kulsq7gn5cn26n44rg2tt787dv/45520081616.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/67611602192.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5a5fdb909---kaxete.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xidadazaxiseji.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/buposemirisupusuja.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zikojudadizebiwapel.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/35418673937.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f787c4a7b3---95634355201.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764212df4a4---zutukixawupema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=adobe+photoshop+cs5+full+version+free+download+with+crack+for+windows+7PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA59 11368 bytes
SHA-256: 2a07e5bbbb7332c3e8466280cca8915b681babd62a47eb199fee56104e683069
font_02_sfnt_off00011506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 16460 bytes
SHA-256: d10f028a5f4d542b8c74e9cd01a2c946a90eb0f582cfb47c5ab3ff4c4c5f8a42

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