Malicious PDF — malware analysis report

Static analysis result for SHA-256 f927eda4467626d8…

MALICIOUS

PDF

102.1 KB Created: 2021-07-08 10:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8890b23227080c4c50f9453319b57ebe SHA-1: 29e0b4115f89dd7c1b6d7c829fae9649ca65fe7b SHA-256: f927eda4467626d86537cce0eb3e6147758593fd37586a1f04c4b66ecfc7c1e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious content, likely a phishing lure or a downloader for a second-stage payload. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093f30866e7e---xavagi.pdf In PDF document text
    • http://geteffective.biz/uploadfiles/file/galamofafododemo.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/0bd20c722a75de6ec1ae10cc21fefaf0/runugilajoj.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/14157851439.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/613695256ec6551e7b55a9e4b43bd7b8/pevanunugukurozowelaxabom.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9b7e3d7ce.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a49f426bdfcad4166ff5b54a6282128c/jexevuvozapajusojupan.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/40568928111.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18c27e0361---26445052424.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/bavomimimanupibamo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2088044b69---ranexelefepuxunugisej.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/86cc68f421feb3164aa7632d24b465e4/senako.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/09b4c2de616cd2c14eb330f09675f6cf/jazitawapiwimi.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d16acd341c---rijidalumatejax.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///luwogoxadonareximidalifuj.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/badiwabezedemafupavosenun.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/050111118555.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/s6d7fr7chmelas0d2o16s2oc3j/88611825666.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/boboreletemij.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/gunikujajubepujuvuvufuve.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/4320495570.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/75980673900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=meet+in+the+middle+synonymPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15229 19156 bytes
SHA-256: 892a8e77888ba81d4ec1cbcbc3879a92ae2924ee3399544a9120ecebb48ab8db
font_00_sfnt_off0000f03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 10360 bytes
SHA-256: 9978777f81eb27adeb7a043cee075ebc4b348f89bf0e1e9048a116ab91188921
font_01_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 24440 bytes
SHA-256: 99f8f791c590185ce21748088bbe9d0a6454e65761a3f652f0ec1a2c0e86d5af
font_02_sfnt_off00014272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14272 4188 bytes
SHA-256: b3e3ca604e198aa4e6aff3ff11c527cc099744a35b3dd065d9d2f04856b6af26
font_04_sfnt_off00017250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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