Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebae1c633b07db9…

MALICIOUS

PDF

80.2 KB Created: 2021-09-04 09:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f02f6f7d9f7916f37f642936d5b0fc8a SHA-1: 16fa37f1c3df9be632ae698b104beb94af155412 SHA-256: 2ebae1c633b07db99ab893baeaefccc5349fc8781c6d26ad5d4f6f7a23fa08c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malicious content. No scripts were extracted, but the link farm nature suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ideatity.com/ckfinder/userfiles/files/35453177038.pdf
    • https://transport-vehicules.fr/userfiles/file/pimuropuvubunezu.pdf
    • http://anvlaw.com/userfiles/file/77951505919.pdf
    • https://eobliecky.sk/userfiles/file/birurafatizor.pdf
    • https://mangonebike.com/uploads/file/86786366449.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/69b4cc055b481f15c8c4b0c203583abe/10581734097.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f43184e6a---53389630005.pdf
    • http://changrung.com/ckfinder/userfiles/files/nuvavazoloworavolidi.pdf
    • https://takipcisec.com/calisma2/files/uploads/14446208313.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/3ff71250d8483ec6295a8136bf2c9dea/besuduvasunuwabedumuxedak.pdf
    • http://immobilieninvestors.com/userfiles/file/94546149940.pdf
    • https://leanuslab.com/UserFiles/file/vogudixizifogi.pdf
    • http://omak1968.com/clients/71178/File/xefogerexupoloxovolavawon.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/9b0444ee42d19b92aa5a3fb6ad10dec8/44189372725.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf6758c75---77245761361.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd9896f7a---memedimomotimafu.pdf
    • http://afgventuregroup.com/cfiles/file/nuwevozijow.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e94b4ac5e---xabezizufavage.pdf
    • https://esvigo.com/upload/files/jifilopafefoguwebitotes.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faab95f2abf---4785074318.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fced1fdb87f---pesuwavesawebuxaxalak.pdf
    • http://staresecurity.com/userfiles/file/75305281641.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=principio+de+legalidad+pdf+peru
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607335c5657da---sozosepuselulujo.pdf
    • 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_off0000d645.bin
5b67d5a799562819ee7323a58b2d009bca98ef3e10739804b679f3ddac1f9269
pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 10632 bytes
font_01_sfnt_off0000ee68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE68 16792 bytes
font_02_sfnt_off0001067a.bin
a98f8664524b5b547ccc69a0d6bbdc77f3983422956cf5207686bfde5968e43a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1067A 17740 bytes