Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd95667cdf19250…

MALICIOUS

PDF

92.1 KB Created: 2021-07-26 21:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e72da1e7579abc1a71270cdc9d7e0345 SHA-1: d014560692fb65acb78b905a2aa68276dbd7f363 SHA-256: 0cd95667cdf19250990851b7b3a45112f906eea1029aa829d2b9fb58d6a120c2
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various PDF files hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to evade gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9629

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://farashimirooz.com/files/jegoxuvavoxajuvoz.pdf In PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ng8mhguqvlbbpu09d3d3jint30/59016230459.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/giriberinikuxusopinojek.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/felizalufepe.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/616561497.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/5408627781.pdfIn PDF document text
    • http://ubest.ru/images/file/fudatonozif.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/1cb68884b2ef45645cf148799de316ab/74672237201.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/42194352732.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/51980865538.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacfff1f0a4---lodomerifukuborepukopoj.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c367b56a---sodiwafamopufamazoxixe.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b63bde145e1---90598005337.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/p4p3nmh5qv2ecsti0ct9rt0anv/pifumekisobupirip.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/kusifarigilakagifivemu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d7ccb53b3---47342299163.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/dopegunerebojopuz.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/38239731884.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/36421137579.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/6365515748.pdfIn PDF document text
    • https://jetaime-shop.com/files/pufad.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/2bfrf9ar0j28vggraheu5aebn7/wugowasako.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/38684955801.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/6477465747.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee5dc3b355---79406667741.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/0d315856bef0a2b121a961ab7f9205d7/52794087355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=epson+l210+resetter+adjustment+program+free+download+zip+filePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013df8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13DF8 16668 bytes
SHA-256: f3165c0fcf8ca59a557f516957d7bd52875323021159fb57b832aa60baae2a03
font_00_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 11496 bytes
SHA-256: e14e534c4772f01dca8de54f6188166c3b8cc9e74a561d67bb7008a120fab6d2
font_01_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 18068 bytes
SHA-256: bb995cdebad8526f1df3aa4fde8be1628f959798e7c77210db784852cfb080f3
font_02_sfnt_off000125e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000155b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155B3 2616 bytes
SHA-256: 253444372db7afee3f23f2f1e569a9d443e6e55efc0445b91ca62fad8e7cb281