Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba6ac644a3178b2…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 03:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: adee89c20cdde658650e24152c19eea3 SHA-1: 108d811ee960ba811ae7b7f98fe4bf5642d87faf SHA-256: 7ba6ac644a3178b2a6c3f478e94a45381da2e925f65299f8beb020a196a318a9
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier strongly indicated maliciousness, and the link farm heuristic suggests an attempt to distribute malicious content or phish users. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://albatrossmrn.com/konadnew/userfiles/file/mifip.pdf In PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/54789560682.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/31730840835.pdfIn PDF document text
    • https://svltv.in/userfiles/files/13672109237.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16080eaa08c6d0---tuvipokupivavuvulep.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f605ea984f---34421216407.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/es7ae6ipsii9iv3kpgt1n77l55/namamarubigorajazo.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/18597729067.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dce58eebede---xukotubevodusen.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/0f1bc87d44c49516f1f6180df68d3b45/robagolop.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/6797683192.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/jitotoxoveledevazuwidi.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/i83h6lcp82n1uuqohksmjkon0s/48732024079.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/ginovazonesabululujul.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8b2d36b42dfc2d3e252799395f827f16/kumubogedalonejinepufibox.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55788934148.pdfIn PDF document text
    • https://artbynela.com/uploads/file/32685345610.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/85589731a8dbacc92c944cac4d09a0a0/96162997282.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/28f468afc008b506c58c3c77713ca099/zesiwi.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/5aef674ce7dd68e795d00af1b2b4ac2a/filujafaratovasijas.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/82664607073.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/82943420377.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/miturajetasex.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/39364795530.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/kulogiwukujavesitogujak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=miami+airport+terminal+map+pdfPDF 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_off0000e093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE093 18972 bytes
SHA-256: 1ce68a3e93b4c8e4d6704ad5c725360aab57c872b5c53cba33ec0e32159ddb26
font_01_sfnt_off0001110b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12922 10484 bytes
SHA-256: 00fe772bbb0790e0a0a692b62d1f564800813beb16c57468e849dd3580ff3419

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