Malicious PDF — malware analysis report

Static analysis result for SHA-256 040294e3773e5ce0…

MALICIOUS

PDF

69.8 KB Created: 2021-09-12 01:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b667c113cd18f4d2ca3fd7bdcc651f1e SHA-1: 9bfd3ffe248dc17e0c3d09c1143eaf15017f797e SHA-256: 040294e3773e5ce00a1fadd1d59e290d4e04a993729003de6e076ff8d2968e2c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to various PDF files hosted on potentially compromised or disposable domains. The presence of the 'euro truck simulator 2 android mobile download' UTM term suggests a lure to trick users into visiting these links. The ML classifier strongly indicates malicious intent, likely to deliver further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613710d085ccb---wudisawow.pdf In PDF document text
    • http://bjjiffy.com/upload/20506107319.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/relobabetotexetutalumupot.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/kimajufuwovexifomu.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/kenovuduwesirijef.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/69095798703.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/53465889161394ead74a74.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1613c81d96229b---letoremumi.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/864j2j09t3ud0asufajn2er0t2/14685639965.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/3196j015fi38srvbuc03g10n4k/dobitoru.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/tevavujevasadaruvejijipav.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/91281503846.pdfIn PDF document text
    • https://digireg.org/upload/togipobisasuxak.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/93469875322.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/lenejesewunodinoginimido.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/73622456560.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613854dee708c---45696111564.pdfIn PDF document text
    • http://ilkemymm.com/image/files/niledapasopuv.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/90176351239.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/tapoxasumarexiji.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/xukanutafejoreke.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/batijewerokogizi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=euro+truck+simulator+2+android+mobile+downloadPDF 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_off0000b073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB073 11052 bytes
SHA-256: bee2efe8626fd29f1e9976290505e66223877571fa138ad79a15b7b1be7518e4
font_01_sfnt_off0000ca48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA48 15024 bytes
SHA-256: 9e93743347ce3ef671d2b30191c5281f7c2ed057afbcbce45c665a6b778ce001
font_02_sfnt_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1