Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6e1dcbb1968877…

MALICIOUS

PDF

84.7 KB Created: 2021-09-09 06:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0c360e88a1021a55bcd5c016ff284894 SHA-1: d3e1855f7300a8543cbc6b685b162b06acbc11b7 SHA-256: aa6e1dcbb1968877c5f762e41dd81489056cb4561cff12c78ec8d38870235398
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload storage or disposable domains, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=android+oreo+easter+egg PDF link annotation
    • http://registermycompany.in/admin/userfiles/file/93044952973.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/30023354038.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/96352196738.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/45814848784.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/lunifinumugugoroluvonulon.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/31836174814.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161392b5c5b9c4---balitagemadax.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/85084508598.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161362a4625c0a---82068217366.pdfIn PDF document text
    • http://saraswatishikshamandir.com/singhania/downloads/file/23306091295.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/45738534755.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/65448641097.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210907_D8987B22DB30C14E.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///talokosuweruboxozerobiba.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136028db69d8---83336106140.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/69259147454.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/68046240995.pdfIn PDF document text
    • https://seger.cz/userfiles/file/panuvo.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/25713084412.pdfIn PDF document text
    • http://thermocomfort.ca/userfiles/file/gitatuvizenijosubunalan.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/vasawobupad.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/65763430973.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/84556798030.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/vibepagilurajada.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 18460 bytes
SHA-256: 6498dc6f5dfde6fd760cfeb982099ff5cc40144528e254a8e99bfee5486e2b94
font_02_sfnt_off00012e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E46 10356 bytes
SHA-256: 8b1f0b36d142f1218231ebe3891c50cf714c8280dac5a5702d9e8b3c62596737

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