Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a1c01510afc735…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 23:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 40bbb25f4f395505e071c8c49a5a9480 SHA-1: c78f38a7dd52e40ef93aad2085d1e49ff8e71547 SHA-256: 68a1c01510afc735f75ba476bd8f2291986bec57c1b5c7e8a8b7fa86afbb1377
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to exploit users through phishing or malware distribution, aligning with the 'Phishing.Trojan' detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9adbcb75dc---49855694119.pdf In PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b94286a8578edde88ed44653684083a/57466900585.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b79be51909---fedeju.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/rubunotatomusapanozako.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/331279639.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/vugogukisaleko.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bdc19b08b06244e5ef4d4bb3d0e4aa9/55851682623.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf4f68bb1---megonugesadalowoki.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/20b5302b1e0e1243b294ee6a7d85f8f9/63663104889.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/vi4h6j81u654t596ko81d4r14n/patajedigusofuwapexogevi.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/45704681300.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e4e8197ab037f3a518c088c5ca0afd99/kidepamuretosiva.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/grbo3mavtld1lj75ruflp15vug/tuxevewi.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/77021306111.pdfIn PDF document text
    • http://tulga.ru/editor/files/96527701285.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072bad20a99e---57317330125.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/89267247793.pdfIn PDF document text
    • http://strandedtattoo.net/file/dogotopapeteresowuvate.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210606024220.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/7988923531.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcbde4c0a8---81657514837.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/1616606543.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/8cb5605c2c731563c98958ebc7525e45/wunazopuwajulelim.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/gapezenudunirinapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=search+pdf+for+text+in+multiple+filesPDF link annotation
    • 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_off0000e1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C6 16888 bytes
SHA-256: 3c953f36c434275724073f33b992ebc2fb4af41f241bb6f9cdee38e43d0b746d
font_01_sfnt_off00010ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 11164 bytes
SHA-256: 2f398f1142d85ba7157e69d9d3f480ccc67ad4dab523a3d2c73696f530e0be0a
font_02_sfnt_off000127bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1