Malicious PDF — malware analysis report

Static analysis result for SHA-256 092ab2493ccdf5a3…

MALICIOUS

PDF

70.7 KB Created: 2021-09-24 17:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4887b5eaba033391206460b55794c50b SHA-1: 407cb68e765f644513dcc59ce9caf0bd3c9fdeb0 SHA-256: 092ab2493ccdf5a318f033816ac6306c1239a88cac4dd6d448aabdef08dc785d
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised websites, directing users to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links to potentially malicious PDFs suggests a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9841

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://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350c68eb7b4---wimadatikirodafofevi.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/penolenorokoguwe.pdf
    • http://racecross.com/upload/edito_fckeditor/file/78567047457.pdf
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/mazutulokowunaj.pdf
    • http://zhuoer.ltd/userfiles/file/nojadimenobamerop.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/80uqli459cpse4abgsk68210r5/93032574501.pdf
    • http://ipost.mn/ckfinder/userfiles/files/6454112510.pdf
    • http://jimsclub.net/new/board/img_tinfo/file/20210913034354.pdf
    • http://www.hgbehringer.de/img/files/files/15330067972.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/4qvb3fv6hacuefv6720u6csg05/venamopawizalas.pdf
    • http://auswallendorf.de/userfiles/file/tekolebilarifirujof.pdf
    • http://thankschicken.com/uploads/files/50955472846.pdf
    • http://indianmailbox.com/assets/images/userfiles/files/23556100988.pdf
    • https://repetitorebi.ge/userfiles/files/woxata.pdf
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mokatisuw.pdf
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/lunoxajedazejel.pdf
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/51867164959.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5e5086a50---dagagukisezefenudisoge.pdf
    • http://posicert.com/upload_fck/file/2021-9-22/20210922184919799264.pdf
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/lafexagamedupala.pdf
    • http://lachina.cn/upload/file/61235884751.pdf
    • https://paklya.su/design/img/upload/file/vopimut.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0fbb1739e95a9538f2b7d34145ccc005/9185399693.pdf
    • http://numere-mopede.ro/mm/file/77606916959.pdf
    • https://www.alliance-educationsexuelle.ch/ck/ckfinder/userfiles/files/84192397384.pdf
    • https://lesrimaudieres.com/images/uploads/file/kabuvudonukudurezidado.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=download+lego+city+my+city
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • 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_off0000b776.bin
c2094eea89cf91550aab535ed57321fd57d7b2808700115ff978562c34771f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB776 10648 bytes
font_01_sfnt_off0000cfa0.bin
c92d72f0ab2c00d7bc7df7258e4d0e042917f510a11cbd3fd8390f4dfa91cbe5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA0 16856 bytes
font_02_sfnt_off0000fb0e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 16792 bytes