Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e2c4312d07cf48…

MALICIOUS

PDF

76.4 KB Created: 2021-09-04 04:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3cba1927e984a77a837655928cb75435 SHA-1: a6e5a647c3cedddee6329956ed4319eab068f599 SHA-256: 61e2c4312d07cf48f3e7c26bc6fe2fee08bd1f326694bc49e74505c2d3b83a28
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. Heuristics suggest these links are hosted on disposable or compromised domains, consistent with phishing or malware distribution tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/sucs00if91m268g2hpve2d3a64/15288717360.pdf In PDF document text
    • http://volamtuyetthe.com/userfiles/file/54588237837.pdfIn PDF document text
    • http://lg-palette.com/upload/files/sesakotefenojevatexik.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210816_743842EE2084E67C.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d67a64a25b8---vobavifenadakelaguda.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1f83ce5877aca95751e82a22637ba34f/xolewigovuxileluxubawozuz.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/kofopup.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/65611294360.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/zopupupamupiwisarax.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/59139524874.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/pegegigotiruf.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/89236175606.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/guzud.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f654c43fa0---84678874100.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/golozefemujafinotifij.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/73691211742.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/8712221478.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2767eac68---25619720001.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/fobep.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f9d05a11a---58085415249.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac68dfef6a1---64527040386.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/8hfiqham059mbkelaoftlfpg3o/ziguxakabivi.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/31811956678.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7782369a80---xugegutivosimonumigif.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087621bee85c---siwonajupumemurix.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/50363866834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=inverse+of+3x3+matrix+example+pdfPDF 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_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 17596 bytes
SHA-256: ba88054dd6b05994767855aa0616c6bc0e4d5fe3b4a4a6c3388cdaa78333d619
font_01_sfnt_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A43 10948 bytes
SHA-256: ba1cb4f7570fa697eea0d66758c932100b5f847a71c390782fe9ea3798aee481

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