Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d3bdff498a5d45…

MALICIOUS

PDF

86.6 KB Created: 2021-10-05 10:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 67ac451bf15c7072837d4d55b3b0e79d SHA-1: 71abdc881fd91e226193908f5aa96932a14ba9f8 SHA-256: e8d3bdff498a5d45443e77cd36b4ee4d90e092ba53769a14c85988010114f3f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites hosting other PDF files, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/ad54d5c6c106ca3eef65408034848d92/zetipigalere.pdf In PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/jfsmgsbd88noe0a953pvmusmef/koxuzot.pdfIn PDF document text
    • http://davcpundri.com/css/file/41987417676.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/takodonewuwatakuleto.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/jagigifufasa.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/bopirazijevopu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/813337b6ea991e2b84ca1fb7e2ed3971/lofejadutuvoned.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/45092419012.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/fevawezeriguzoduwe.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/18284275121.pdfIn PDF document text
    • https://songhongresort.com/img/files/dobisekejolalabepewuvu.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4j7mbe3b05a9h6k5hrlvsl34mh/37108995561.pdfIn PDF document text
    • http://maidichike.com/upload/files/35013721964.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/1289117312.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/55021746839.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/66910235706.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/9521230490.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cc94a7f22---ximobadazoderotodusu.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/be9492ade797bb6381cff1bb29f9b726/77614102714.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161538eee5eee4---1391041143.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/lufiwivowawube.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b455d3cdh8en12nihihgci5k4/fililopisupumodozifamimiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=naal+marathi+full+movie+free+download+mp4PDF 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_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AB 10904 bytes
SHA-256: 89a10b7cc0fe4f64326aa095d84b3bec97c7375d42da3e2f14b8f86a6083512a
font_02_sfnt_off000119bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BF 19676 bytes
SHA-256: 78b4d00b315431a4ea31fbc9dafe2ae384250823b44e718c36a1d464cd5d54f8

Open this report in the interactive analyzer, or submit your own file for analysis.