Malicious PDF — malware analysis report

Static analysis result for SHA-256 364c25043e78d62a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-06 12:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e5fb10577c3488e33df9aa50f299139d SHA-1: 59f1dbaa26e608437953ee0c81ecfe5d43a18974 SHA-256: 364c25043e78d62a1d00b45706518f031891000d94ac82b28428875628c48fc9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the overall structure point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=english+telugu+english+dictionary+free+download+pdf PDF link annotation
    • http://cuanhuadanang.vn/uploads/image/files/89553842318.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/batalokiditoj.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e591f29472---26380518262.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/kizesimogojikowivukebidez.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1032cad9f2---lewugajobol.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d52d81c9efaaa15f602b2339db9fe6a7/37604776932.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/44447851998.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/wakemobazajavamiva.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac958e889d0---bifemawijomemowal.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16128db0762aeb---61589366636.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/femalokobajogafumasu.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/827c36096f63f0f287d916a1aa7af7e0/97787291014.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210625201040_i6dlnd.pdfIn PDF document text
    • http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/togibixogewoluno.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160804e4b1ef46---77877984022.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/mamamadunileg.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074dc69221dd---pipugavurisitojof.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/b3c08b71b6ac64a72d015f43bb603884/98864024147.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160879e9b5123b---givinireto.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/50771297651.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/362bcf502ba7636b8e7735e21956e127/97392288030.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/83512186857.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/sumonigolewudiroxeb.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-23/20210523065807639152.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9s408j5kvtfg2k7249me4ejfva/87377503798.pdfIn PDF document text
    • 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_off0000df7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 11180 bytes
SHA-256: d37c693e39218c1ade239a76850298329c6210a289391016bee0bc8ddf8fb1c9
font_01_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 18784 bytes
SHA-256: b5c7df434dd587a83f84047bbc29dc332d828ff56ca1f7639ba623faa274f35a
font_02_sfnt_off00012a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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