Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6af8b359e09320…

MALICIOUS

PDF

80.3 KB Created: 2021-08-01 16:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 99098b5878d00abf3aee6fd2bd53c903 SHA-1: 8b859678db91045669d6d4b2e3d03f5808853178 SHA-256: ad6af8b359e0932021d7e4281d6940299d98b0fa7aaa2b3aae6ad0e1f07065e6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites and other PDF files, indicating a link farm or distribution mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bocghedanang.com/media/ftp/file/xizuvapilejur.pdf In PDF document text
    • http://hanarotalk.com/userfiles/file///zuwiwitizejevimodugol.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/95687996960.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/f73io186dvkbekagalb2o6tfur/kexijodulapudukewugaxuji.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/2e6026ac592c515a53b4bad9bff1932f/10755017639.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/196d931472ade36eaa88195cc72bf1cf/8107052022.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/danodimi.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac0bf6553d---zejodiwaxujedifemuketoj.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607923cf09485---30982427159.pdfIn PDF document text
    • http://melinterior.ru/userfiles/files/15090348900.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/nixejaza.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3e82487fb20653e105185e6bb9b478d0/ramulifudewebiwa.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/98779238403.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb73b9463---ravubuzafajewonuxitiwos.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/goxasamolanugezazeso.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/lopuzuzobizazavageladunet.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4654db8e41---lepenimezewifom.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e74daa32d5f---kimoxenifazojiniwas.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab795cd2ceb---zupawojezatum.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/bpca04u1gevua18q057jte0inl/moralizutuwebugebele.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/12d5ab239bb37fd04a27a0562746a1fd/30036033332.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608085e4d4050---rapubafaziromez.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1sl9ttgksbpcu510o5h57hcqr4/15604479754.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/7s195ttt6s2616ihftho6k4umc/46069133752.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/sedunibujuxoxogiga.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3lgp7nktqmf7el2mmo4kgutdf2/puxubaret.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=elu+1251+radial+arm+saw+specificationsPDF 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_off0000d22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 11256 bytes
SHA-256: 4f3396b3913e2833e9542a1ca1f9e9a13f3c1cb83e85dd92a9c22f1077c371ea
font_01_sfnt_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 17300 bytes
SHA-256: e984363b2b5e8d4d6f18810185aa080961dd0fd402a28ca4a21d391b259a9a1d
font_02_sfnt_off00011a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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