Malicious PDF — malware analysis report

Static analysis result for SHA-256 150a5411c565ec9d…

MALICIOUS

PDF

86.3 KB Created: 2021-08-06 03:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 93db031d031026e5ba976666a449ef7b SHA-1: dd77849876d5a0439a00631b40d980dde6c19890 SHA-256: 150a5411c565ec9d207ca11eb87cf00ce6081cc8f971ab7bcb1fcf71f2c163b6
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as a lure to redirect users to malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d358895b2d1---tekijiwolirizevosaratofuw.pdf In PDF document text
    • http://aklond.com/UploadFilesfile///2021052817344191.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/vuduzoredidoxalibole.pdfIn PDF document text
    • https://aspirans.com/files/file/xafiw.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920f1279059---88906739186.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c715da7b60---sijedura.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a26dba3d98b---71710365687.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/fevesotabimo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5fd075981---nunufuxojajubuzutubetawak.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/padifexumelifir.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ac636de16dae5b447a4e025a82770451/43931615414.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/lexuxujazikajojavig.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/nofur.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/ruzimu.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/nubekigur.pdfIn PDF document text
    • http://mopron.ru/upload/files/48416684639.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/47355729649.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c302b81a26d---xufafefun.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c15578709---2688056312.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a00f6e6dc4b---zadeloluwesedipolufusit.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/lajafase.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/97231805101.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/71040698168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=where+can+i+get+prayer+beads+sekiroPDF 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_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 17036 bytes
SHA-256: 4deb67013f622c78b7dca184b61b3878bab6d3a108d3411b0070c0f0997ea6da
font_01_sfnt_off000119cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E4 11084 bytes
SHA-256: 9e513d1acb12fc52d48f0cedddf8fb6b4d5bed7daaed3041b23503bbf7a9fa4f

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