Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f994f290cd96bc5…

MALICIOUS

PDF

110.5 KB Created: 2021-06-28 13:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd5c38a0197404c0e57362d04217fcb9 SHA-1: 7eadc2599b2f799ee0d1076ca4aa82c74d67d0e5 SHA-256: 2f994f290cd96bc5ed6b127a3af273dc8c4edb4696f45b13fb063dd194ca625f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories. The document body is heavily obfuscated and unreadable, suggesting it is designed to obscure its true purpose, which is likely to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c423200a2f---sodopaboxapubaxawirapobul.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/710dc041b95377fb94ee56695346ada2/sutilumabapavujejizaf.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/demiwifu.pdf
    • http://muzeumostrowiec.pl/obrazy/file/muxopopulobumi.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d28671215bd---luvemal.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607585f4bcfb9---92973556132.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160afce768b554---76064721609.pdf
    • https://schmitz.cz/res/file/413311371.pdf
    • https://webmenuplus.com/images/file/xavimodo.pdf
    • http://heureka-cz.eu/files/dofelipo.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/upm6pafjf821l4ojh69ro95vb7/90657366075.pdf
    • http://otoozevran.com/resimler/files/78547523961.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/7697fd72b8cd06ae035a65cd91295063/telowifepejodevemimiralen.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a13fb3b7d1b---wadusi.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/2a24670bea37be2b3dbf84328d4fdd18/jijotilinebobulaxuzuf.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cbdba262a---sesezuvusorivudef.pdf
    • https://chaletsuenodesol.de/files/zavakekutemo.pdf
    • https://bushregenerators.biz/userfiles/files/27937734995.pdf
    • http://fmi.lu/userfiles/files/tivibesizimomufubafiw.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/13008aeb576ed0e18d83661da4b2c113/36152077389.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a112e1abe7fe1376f014df7daf8035ad/kiper.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f672e0804---wowujebegakixefafovukiro.pdf
    • http://sungsam.net/userData/board/file/movibeki.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=equation+for+gravity+on+earth
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131db.bin
9ea9197b6a75c7fe67a727ea228f5add925cef9a7182c4c37535d81b948c8910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131DB 16108 bytes
font_01_sfnt_off0001470c.bin
50571e1497365d0d0c44da8a520a03a9508b27c320e8beacf32374150f56b019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1470C 20276 bytes
font_02_sfnt_off00017bf7.bin
f1ab43ee580c77330e5d18faa62d6d24547899dc081a05b97ac97b9c0f351a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BF7 10688 bytes
font_03_sfnt_off0001941e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1941E 16792 bytes

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