Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e8f1fc31f428e6…

MALICIOUS

PDF

112.0 KB Created: 2021-09-03 08:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: f6110eaa8da5c842d94d54d6052f5c56 SHA-1: b6ca23688ff0ba7684260131af79eaea7b846c0d SHA-256: e7e8f1fc31f428e645d4482a23e7ddbed9f9655d1ab8c9bb10c9ff6022c308f7
124 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. This suggests the document is designed to manipulate search engine rankings or redirect users to malicious websites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.1362

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://ltssinternational.com/res/wysiwyg/file/43398847206.pdf In PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/55852285051.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608190691e56d---rediwi.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/gulipo.pdfIn PDF document text
    • http://mobiliteit.nu/files/xejitanalesexafeni.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3797a4e2a---zakirumikufebuveper.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/tmkokipp31f8oku3bhlq6m7c9i/gajusagene.pdfIn PDF document text
    • https://faceless.me/userfiles/files/34830358644.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9829b8042---7361640763.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/pinose.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/42fb67b2639e0ccbf178288b4d7316f5/teviziwuvobu.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/tuvelosir.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/e6da3adc3828443ab2fe82062bea2f64/3094435391.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/42015745452.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607b186eee800---94407771392.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/fomuxanebopupe.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/gegadu.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/wanenajiwufawisuzimozogof.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/6241580953.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/44857534003.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/dobemubadamogadubu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b08a65b9d6c822d9e2cead0522f34b42/15203263624.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/dudaguxalowopegep.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/36249825020.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/wapelobikufa.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/1djson1po0hocdhc76hbn27pmi/wujefesowivezara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=fathoming+the+mind+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17915 10608 bytes
SHA-256: 3054d2b57b38cce2b3a00e1d40b80c2db20cd135415b807812c7c65d4b06ade1