Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ae30040117f416…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 19:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddf2835c8eb413167551a28548401959 SHA-1: 7c6e3c7f8e53b96feb7e991724159d5231167026 SHA-256: 10ae30040117f416a13079dc6948827db624aaeedfd96c9e10990bc6d46284ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous external URIs, several of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests it's designed to lure users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://catamma.ru/uplcv?utm_term=be+strong+and+courageous+sermon
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/xilezuwinupimav.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/1754f56e29d83b77a1084640303f159d/solibagamiduvefixasim.pdf
    • https://alakharia.com/public_html/userfiles/file/jurezupeliresirefex.pdf
    • http://globalroomplus.com/bot/ckfinder/uf/files/42352785179.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/kue08fmsa3rjh1l0abfn2ck386/bosukanamabajivil.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/edkoonkjjbtd3nm6rrsl9bh2d4/jowapokebijugenokibakuze.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/lo46imqems5pfpktmuvcl4hj3d/wedejitinugu.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3f733532---81106761637.pdf
    • https://idosekotthonaveresegyhaz.hu/files/files/wenaxoli.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ece1578298a759b5448b7f36c736662f/68846391390.pdf
    • https://esprimagroup.com/userfiles/file/93012130861.pdf
    • http://futurepoolandspa.com/ckfinder/userfiles/files/83134362446.pdf
    • http://liveranigioielli.it/userfiles/files/13349513732.pdf
    • https://thietbidiensino.vn/media/ftp/file/23542385429.pdf
    • http://tipiland.net/upload/file/55284989982.pdf
    • https://ruiguoex.com/upfile/files/2021/06/03/8462367741.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/7bf1c20d451be39dbcb8690c96414e2f/vujubipo.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3683004b7---ziwigiziri.pdf
    • http://pampa.be/uploads/userfiles/files/63153540633.pdf
    • http://tungalag.mn/userfiles/files/tarini.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161186bef39f8f---87868150616.pdf
    • https://baoyi-chuck.com/ckfinder/userfiles/files/todarakuxasama.pdf
    • http://one9five.com/userfiles/files/wanatavaradimoxoramo.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77c789e9a1---tefibagabuk.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd492338ae---seborisurabununenusako.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_off0000d746.bin
41e78e0608d4030a71797a5b44d54abec5af1e1c952c5d286fcfdd8fbf72b820
pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 17540 bytes
font_01_sfnt_off00010487.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 16792 bytes
font_02_sfnt_off00011c9e.bin
bd1ec5be39161442156243e021f59ffa0392928ec1fad4b4264d73cb4d521fad
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9E 10728 bytes