Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65f7ee592006337…

MALICIOUS

PDF

66.5 KB Created: 2021-10-01 15:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 21ea0b10df3e2d417a16de9ed8520a84 SHA-1: 9f51ad001447e54cfb56eb4fa9384c6128ae43a0 SHA-256: c65f7ee592006337135f17323492605a81f7ab563137429526febc36076bdcb1
144 Risk Score

Malware Insights

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

The file is a PDF identified by ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4228

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/74090780235e8806ecf3a3ff8f7d86d6/3453075779.pdf In PDF document text
    • http://limoride.net/gallery/file/97888343346.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/nonesivawi.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/fusagekolalodumifi.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/zifibukarutufo.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/uqmehn8lmnj5i9t0tu3gr68s1f/nosufuguwozodev.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/najokarozuxafozaxefu.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/kijavezedejikurenogado.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16148ca70c36a3---vezomadimepimil.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/gepelemofo.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c9f76854c---63374677536.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139beb9b244f---12258505348.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/52140550934.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/mugarodolenagirokuleweri.pdfIn PDF document text
    • http://shardamedicalstore.com/singhania/downloads/file/99638700496.pdfIn PDF document text
    • http://online-cycling.com/files/file/1550609201.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141576cb2120---77767018511.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/87774952119.pdfPDF link annotation
    • http://sfalojistik.com/userfiles/file/82996477994.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/65565210588.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/65310090006.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/kebixedigatozaka.pdfIn PDF document text
    • http://vce34.ru/attachments/file/domikuxuzatobasebulepiwum.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/vugajok.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/66439593315.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/91497141824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=after+full+movie+online+for+freePDF link annotation
    • 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_off0000b3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B0 10192 bytes
SHA-256: d61bddcc4681debd26c4da5b4fd61a3d86d23d050245c78e25b936501eb49964
font_01_sfnt_off0000ca7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7C 16948 bytes
SHA-256: 46350b4484c44d5639bb6f90a63ce12032bb29e23c95ea1fa57c47513f8166cb
font_02_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1