Malicious PDF — malware analysis report

Static analysis result for SHA-256 786e8f160143897e…

MALICIOUS

PDF

81.1 KB Created: 2021-10-12 06:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 18bf062c3fb6a280bdf49c5215b5694a SHA-1: 56f7668c9ec08ca7ad80f46103ed94bd4e9c3e96 SHA-256: 786e8f160143897eeb4a0457b2d2d6b7e771c5eec55ef28a6280703d959186f5
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm utilizing compromised CMS uploads and disposable hosting, designed to redirect users to other sites. The embedded URLs, such as http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16148e524963a1---mofos.pdf, are indicative of this redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b88b7e9c8---lodevowosuzelu.pdf In PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/38193561561.pdfIn PDF document text
    • https://kokomanis.com/contents/files/jerotakefiwilem.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/zajirikojuminamu.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/niditu.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/42168775073.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/kukiwuviresawejepurej.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/ribejuzozobidiwelelonaxij.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161614abde81ea---9761149426.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/93942224937.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16148e524963a1---mofos.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161500bb049378---vebogoxote.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161409074c45b0---79905698371.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/xoxafuluramojixelanojiw.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/lozekekijumobewewirekat.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/89813768932.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/82676360213.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/pisuku.pdfIn PDF document text
    • http://otczenacts.com/media/files/68715105167.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/90111810768.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/xipujifiluvasiwu.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/3335261744.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/78987047291.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/4dZi1sgP-vI/uplcv?utm_term=hibiscus+paper+flower+template+freePDF 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_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 17860 bytes
SHA-256: 144868d592237ca3bc719fcf2b0a49cb2bbb7757398e77d0c07c3c70bba33f1a
font_01_sfnt_off0001058b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 10856 bytes
SHA-256: 47d8e30c7e0d4299075e56fa1263526adecebcd112ba9d26bac0e44428a97566

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