Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fe6fce3bdc6ef0…

MALICIOUS

PDF

85.7 KB Created: 2021-06-28 05:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d80af0c39704dffb329a87858ff67e23 SHA-1: d1a886095f0cc647b83b55341a95cd2899dc121b SHA-256: 62fe6fce3bdc6ef0e3ea38860ab8390fb7bade9bd02cb8a2fe0502506eb9a4d1
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised websites and disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://washchienluoc.com/upload/file/47648228743.pdf
    • https://vibangnhadat.com/uploads/files/72545309687.pdf
    • http://vzwsportenmuziek.com/content_docs/15684753326.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/iu93pru91f9nrcrt4p24o7fon0/ludalativ.pdf
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/80673346110.pdf
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/51057269914.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52926516f---25699993521.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/c6e38243344d01ec94e093706fee2636/dobuvibadam.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072351b936ec---bijekoraxiluwawepoz.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa28b4805a3---36116455189.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/c38bqbe3ru7794g1vsq94smio0/88505675082.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f8c635aa---dijozilazotopidoj.pdf
    • https://arrayamed.com/userfiles/file/15507672081.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c9842c798---webeximoxof.pdf
    • http://aep-tc.com/cache/fck_files/file/3370425104.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d73ebccef---53620317560.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160873abdc6110---nugarolaxepememuwom.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b37313f0fac---32044458611.pdf
    • http://espacioschillout.es/images/admin/file/72545841597.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/p0492h4rlsaspkprhs0vg0ks15/deloritepovi.pdf
    • https://deltagroup.bg/uploads/file/zumotetilarokupomozad.pdf
    • http://kingalbertltd.com/uploadedfiles/file/fijonoxawudo.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/13b0d681da6629f5a0c9893a577d4136/kajonogu.pdf
    • https://jpjplumbingandheating.com/FCKeditor/file/fotuzegefem.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/a712k2st3roatvmucfkrn6mjsi/94283730966.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=new+orleans+airport+wifi
    • 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_off0000eb5f.bin
60b8b8d5d8d1fcab6dc1ad2b47782e23cc75ace5b0dc583099e8781ed9092b9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 17988 bytes
font_01_sfnt_off000119c0.bin
3e00c18f9bc3789c65e1177d0a29b4b0bd18630bf61c6c3b7da1d8a2e196abaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C0 10412 bytes
font_02_sfnt_off00013189.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 16792 bytes