Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d949783199c3b8…

MALICIOUS

PDF

86.9 KB Created: 2021-06-30 18:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9870a6afac61a0dc19eb35de4eb03cbb SHA-1: 36312988832b1406eaac5889a9d4ed45f14422f5 SHA-256: d8d949783199c3b8dfac7788e4f9e0980bb729be646231b35afcffb67f24a173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics suggest it is designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ebsenglish.net/_UploadFile/Images/file/tugizezomowupidizujek.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e3aeba41---jegivofi.pdf
    • https://jetaime-shop.com/files/godutu.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/fa63ekilf7bc2a05va0tf43ot6/zalepije.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/7c019ce652b4f06b6009ff16a84c364f/48248692649.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609744dd3316c---13240114330.pdf
    • http://charivne.info/images/file/mejoditi.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/eng39gesdpdn2jp0lel0qm7j32/52855343994.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160928f72677ec---zajupojerogiruzareven.pdf
    • http://asea-admin.com/_userfiles/file/20210601170423.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f5d5b72fc---98119260602.pdf
    • http://augustaelectricalwork.com/editorData/file/38900053807.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160777288961ff---92381657687.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/sies4k8q71s5qdidb298uvjn96/biluletef.pdf
    • http://elite-nails.pl/Upload/file/bepixodunobupoduzekapu.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607071a32b84a---26319469647.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7beac0384e---16767130403.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc53ab0b03---pobuxoxofulowasako.pdf
    • https://baobihungphu.com/media/ftp/file/jezepufalijediduju.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/12d10e11eb9e1b9be56b77d2acd22c9b/70976760207.pdf
    • http://freeski.hu/freeski/file/14407856460.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da70b77b21---xerateponexurezaruxep.pdf
    • http://cainghienbinhduong.com/uploads/userfiles/file/95297906795.pdf
    • https://activepymes.com/pub/file/36339218387.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=song+of+the+open+road+theme
    • 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_off0000f17d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 16792 bytes
font_01_sfnt_off00010994.bin
c21699f60c5220d6190ee0f46981d65f2c9000ab2453c1c7fffeaa38676408f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 10712 bytes
font_02_sfnt_off000121cd.bin
f9e398320d51bf8c8a61dd15d0b9d9e1e2c6f380fc62de7e32495270826f209d
pdf-font-stream PDF embedded font (sfnt) at offset 0x121CD 17108 bytes