Malicious PDF — malware analysis report

Static analysis result for SHA-256 896de1ea558e3373…

MALICIOUS

PDF

90.0 KB Created: 2021-06-26 14:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e769e08e97abd83d95198550a31c414 SHA-1: 7d5771baf34aa150606e5e6b6dbe4ab3aede03b5 SHA-256: 896de1ea558e33733c9756d2c83f94c1f9097cc7f6337b1d9a34bc2a70dc9dca
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous compromised websites, many of which are WordPress installations hosting further PDF files. This structure is indicative of a phishing or malware distribution campaign, where the initial PDF serves as a lure to lead users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/d20c7968b8bedeb1185e49b964b56342/wenevorituzesas.pdf In PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e6f3a125---92519759089.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/44175461107.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/27474778573.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/tr3ds2b1qi3m9kg4cub4bj2ceq/29352190497.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160976c1895f4c---55196352473.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/hj5hnka9tl24ck8ddk2ohihji2/51242444284.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/60374350768.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/gilukajavogomedow.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fd91c7ce---35877247115.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/8f823781d83dcd15aeba953acc8a7712/34269863162.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hthcu0lhkl80ehbg416ki9564t/9242622469.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/53753496890.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3aaccdfc---18719301198.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607390e24d55f---linolujaxumegevutaga.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/k0ut3milbjjtk1p31ti90beb4c/22941791735.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/d91e20faa88e995db48a40b61486500e/xabadejedobe.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/temosafobagivujaxepale.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c304cfd88---19160611705.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddeb9aae05---91598777138.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/50a1436d2b08797bb856c3b76232da20/85078434316.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/2er6f67nm75e0jr7e1lhnoj4v1/ziluwolerov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=my+dog+sleeps+in+my+bedPDF 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_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 10620 bytes
SHA-256: c74508c9480f45276fd34ee08c04b35cbdda3182ceb4e49d3975c16a76f08b04
font_01_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 16712 bytes
SHA-256: 5c5acf6ceb9cbef262a9c8311ab4dd1498fd39179f8e2175de1457a87ea5e917

Open this report in the interactive analyzer, or submit your own file for analysis.