Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed86197d8d23e570…

MALICIOUS

PDF

83.7 KB Created: 2021-06-27 22:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d3c1ae851fb00c90c12fd5e90cf994c SHA-1: 5c169bffdf1e4bbc5daa34e63854d903918a135b SHA-256: ed86197d8d23e57063e0cb20f8c50338bf0d870a9d8f1236912f8612e4db47bb
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting it's used to distribute malicious content or phish users. The document body is unreadable, but the presence of numerous external links and the high risk score strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/06g1gv84icr0ousgrr5o4amnon/xevarumanevibajikilamej.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/kvi6lfee43jhvksuvo2ilquoee/77008741440.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/bmnf11ml5hdjukgfghbakrrsq4/61398007099.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/89dda0a1af405299e06464573520f3bb/33937093145.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/23624211068.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ff336a42b678622b970b2da1d003dd9e/1911250643.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af5c7a45f2---18336316937.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/c72b7510cd4dfa3853f3a444a8768774/36650977727.pdf
    • http://aliceinformaticasrl.com/user/pages/81960511573.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf847739d8---55528751174.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/f73790df408a6525234a992aec830935/kedudinezamigogakekipufev.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ae1a3d849---41968485780.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7b64a21d---81779297494.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607979467dffc---buloputoki.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/cd20771f45e755b0182c7f46b9b16ba1/nedel.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/3n8tk23ambc2ah28dvujilud83/xivotapede.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/pub3rp6h2s5d0r2scacb6k1b62/96794449585.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=what+is+defensive+strategy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cb.bin
fecee9e78fad2f7afe22c449ec99be099fca6bce6b81fd25c02fc085028fcd01
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 17308 bytes
font_01_sfnt_off000111eb.bin
430349750c96f41bfee109ce6be54cc643ecfada17f042f6a18a0245dcf7afee
pdf-font-stream PDF embedded font (sfnt) at offset 0x111EB 10640 bytes
font_02_sfnt_off00012a0e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0E 16792 bytes