Malicious PDF — malware analysis report

Static analysis result for SHA-256 2882a45c15c35f3d…

MALICIOUS

PDF

90.6 KB Created: 2021-09-03 08:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: df0d887f6c3528cc57b6ad165fcf79a4 SHA-1: 47eace6a7d7a6bdcd7dea0871a0317cceb83d5b9 SHA-256: 2882a45c15c35f3d1e94f2324aabea0adfe76673ec1a124725c7f943882dd7da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF-specific heuristics related to URI and link farms indicates a strong likelihood of this document being used as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=bafang+bbs02b+pdf PDF link annotation
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/4fef46v39efidelqbt2f8deai2/65455637633.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/kenonenevu.pdfIn PDF document text
    • http://sciattella.net/images/file/ruluvofanofumemegel.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83414a11de---90729088558.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/faxaj.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pugizozetujagakonomogila.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/saxunakatojerelabemasanim.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b11a3abc7---xiviwawixilewin.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8278cdfd6b---73211555550.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210522162168353513.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/11033886445.pdfIn PDF document text
    • https://media-get.com/userfiles/files/tasabozenoxizimisivori.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf207ddd78c---4330506384.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/gidogeva.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4bjc889ehdlu4oi5cl6g32oj7p/regidagikajuzo.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/kagogexunuzexutinuloravi.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/d9ba68f5d47db2146211a3b5e24fedf8/vimevutofemo.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/barifudixobozapudojizor.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/72973467739.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/wiwenino.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/89007001594.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/wulikek.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/rosunakojerufepizep.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/96781011425.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 18908 bytes
SHA-256: e4872242a837b7b58bb5ff9c121617eb0268252e10f2f2ab5cb243980fbcd8eb
font_01_sfnt_off00012d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14522 10520 bytes
SHA-256: 160e9a6127c03402b46c97b95ed23b6d6b1d764188016717771be74c4dd3fdd2