Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f45efbb63e8b36…

MALICIOUS

PDF

78.6 KB Created: 2021-07-13 20:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fa1b6ba1d936c33b31eb25f77b8d020f SHA-1: 4b27b465c2e332bfc1a92aa0d27a773d0eec6595 SHA-256: c3f45efbb63e8b3617002a16be9289184d0493fdfc02e11a9b9efafbe2f746e4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/2740e65e7e85ca26bd1a8fccea6e19c1/radapaligozeriwutininusom.pdf In PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/to6t77udqaucrdcme0p6q96jhg/93036332402.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/18708439220.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d912440f3ec---47879029095.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c803c0cce5---99881070912.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///lojajujaxizope.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/35618695995.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/40312265905.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/24765278163.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d371566f9d7---zibususos.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031c6ba953---suzuxofaf.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062218175273499.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e48910c844e---juverusogemazu.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/wukisisajilokega.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/87482372923.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/4208009.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778d72118bb---93678623092.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/avdc6li2rh6aqrulbr7bot86ib/tesowuzewuxusajegigo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1accd588be---82441533463.pdfIn PDF document text
    • https://moolans.com/uploads/files/fogukisixipalavovukutofeb.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/eff056b2bc4b119ec8903d162fe4884c/farokatogovakaredavori.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d8k35tc8n8a72nt0c7i3lircv6/70720506826.pdfIn PDF document text
    • http://chamdure.com/DATA/files/65873281016.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/b496f5d9c5fabe394e83686078fd9767/kevofofiwex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=types+of+computer+securityPDF 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_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 10504 bytes
SHA-256: 3e09c8652666976fedc2d7dc4333cc451c3ee9e32e21393a9455c73632e1bff6
font_02_sfnt_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 16076 bytes
SHA-256: f13dfaf547634137211638f08b9031e9c757785f24992bd33d445b7a414bb2e0