Malicious PDF — malware analysis report

Static analysis result for SHA-256 702e1f39b5fa7a94…

MALICIOUS

PDF

96.7 KB Created: 2021-08-12 02:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 527092bbf2f15a0cd95f905c2a3ae0b6 SHA-1: 0caed8f2169edb03a136e073be12044df97aaf9e SHA-256: 702e1f39b5fa7a9427a4f56a91ea2acc21fd3571ab8009b5a6bfd833746091f6
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious files. The document also contains a visual download button lure, reinforcing the phishing and download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zemiigori.com/uploads/file/78387147376.pdf
    • http://m-s-g.ru/userfiles/files/47503651256.pdf
    • https://etadelloro.it/images/file/degimosudufetixovid.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/18f108c7b25c10936c409fbab0493884/ditolutoxagudaxidewusesez.pdf
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/lutokasekiwesugefujosulit.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/14324914032.pdf
    • http://asiancfea.org/userfiles/file/zoleruzolofewazuwodir.pdf
    • http://technestudio.eu/userfiles/files/zenufagubuwa.pdf
    • https://narimasu-chintai.net/jcfiles/file/tejifadekixojidar.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9383775385---sozagesulexumepojuzomure.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b01600c014b7467ec4db0634279fed45/pobuwurufi.pdf
    • http://terwaarde.be/ckfinder/userfiles/files/pavejisatubeketosodop.pdf
    • http://www.cenlafilm.com/siteuploads/editorimg/file/lazukixezudox.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/bnkcea93mgb9qui3qf81rtmhbf/besoto.pdf
    • https://biovuspharma.net/userfiles/files/bupavapuxudibenadixezisem.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0dd130286---bumotuzi.pdf
    • http://balogmihaly.hu/UserFiles/file/zasoduxufesonafopo.pdf
    • http://www.premiumimport.nl/ckfinder/userfiles/files/3129579550.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/864f23df0381d4ca76cb56ef5ad1163d/mabizomolixogenuzadado.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d498f4d8a7---lasajumuvajizis.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a238f223b98---10653308088.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf03fd7eb49---dipediwatevetuvebanap.pdf
    • http://bualuang101.com/backoffice/upload/files/71964706770.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/a1d28jjeou7a65e305jobslgsj/95333230689.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sony+acid+pro+7+full+download
    • 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_off000115f1.bin
eb9bf33321bfe70457d74ff6c456f2710455a95b06dabb38527e77636e8460a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 10640 bytes
font_01_sfnt_off00012e84.bin
70e4cd088bcab42cf0e778084254dd929ed18d1453557d1906d1688b686b4ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E84 17812 bytes
font_02_sfnt_off00015d17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D17 16792 bytes