Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e825cf21c8f41d2…

MALICIOUS

PDF

146.4 KB Created: 2021-08-03 06:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fca8067a38f34dcb266574c6325c36e5 SHA-1: 2394c612be5093e80bfaf65b93be93f2fffec3c3 SHA-256: 5e825cf21c8f41d2d5ff95e69f0f0fb28454e71fd9f9c8662bef1fa2ba5d96f1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9600

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://sneedfamilyct.com/clients/44919/File/kojulozilarejetijalokugu.pdf In PDF document text
    • http://amuseonline.com/absite/userfiles/file/56182256687.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/42dd7aee49d874d92dd41885fd2051b9/xuruzojujubirujumofijav.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/36177125003.pdfIn PDF document text
    • https://petikdaun.com/contents//files/vedoxoboridozefedilazimo.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/3829cc434242ff5499bcfd68ed099361/50667804551.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/tuxojafigolepedadaza.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/pulejuxe.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/82516216281.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0b4a2dd715962b55341bfa5c44dcc9f8/tiserumirozanumegebes.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/fomuwuvadesanutufaj.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a0a75b3b2---zeboz.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ad4ea353---47825907596.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/57168614016.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c55b3bcfd---jaluvotaxusarutetogim.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609432f369f20---21849063483.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/lobesod.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/032c9ff7ee7c66306355539461ab4b31/65816242946.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160743aebc11cf---debawa.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8b08e9a1c---sotazutag.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/9e5942f85a10efbeab19e6571333dd6e/84439865763.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bi0l55u1rgeijmoqsbuno5rpm/94369590643.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/kanaduj.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ev16pbl70bjusfev7366i46qv7/52910655799.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/wejoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ielts+mock+test+2019+pdf+free+downloadPDF 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_off0001beb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEB2 11280 bytes
SHA-256: 7d33c37b4cd5244178a87fba429ea8f7078ada61b6d79662bfab83b5a859d77f
font_01_sfnt_off0001d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D95A 16120 bytes
SHA-256: 5cfa37fce0989fcd98349beccf9a63719aff29e66b00f3ba655f54b68a91f5d5
font_02_sfnt_off0001eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEA9 19220 bytes
SHA-256: 354632c4df8e3433bf8f600bb119af57a0ffb05402b8595f411cd90f5509673c
font_03_sfnt_off000221a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1