Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b886c7f42cca46…

MALICIOUS

PDF

88.8 KB Created: 2021-08-02 18:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 309c70c228c38110b017fb23f581aef2 SHA-1: 0b76d53416d73f8f290730ad320ee3c32eff6156 SHA-256: e0b886c7f42cca46351e8e69c41727d0f2f3c40d608a6781cd6528e842d57203
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://aawyx.com/sites/default/imageuser/file/dizedu.pdf
    • http://xatrbio.com/userfiles/file/sopexukagaxomimo.pdf
    • https://celebicatering.com/upload/ckfinder/files/wegixugefazar.pdf
    • http://congtrinhnhaviet.vn/upload/files/mezinokazipeka.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2f4679c6f1beee79be98fc8f2a94b407/40752702463.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/salufeletapufupezi.pdf
    • http://bettekingproductions.com/clients/874300/File/mefovamujafevijumedosular.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767811774bf---51563152072.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1522c051d---59517003020.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/pq19ac6qt9n5t1h0cis800fbag/2093381881.pdf
    • http://zs-oilfieldequip.ru/d/files/rinafanewaxo.pdf
    • http://chekeeh.ir/basefile/chekeehir/files/4884732867.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/2cda56eda7db6aafee415fe49a5fd9b4/59016878802.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/ad1709e8c72212f17c4762d1cbfa76ba/xejixatekita.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab9cc08a5a---vesemesapexokure.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/65ea354cda293102aba2dfe06c8b4a4f/55042110146.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a22351c21c2---17000098561.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789d6228cf2---21914826176.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/3c174d9e743b98de9648299918d3a931/repanepitaluvife.pdf
    • http://zamel2.pl/userfiles/file/44061644936.pdf
    • https://golf-tout-terrain.com/publish/page/file/18474223863.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607edfdb91521---kuxusadalizabebewopavisa.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/70249810056.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d26066f962---92429095046.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/3sfo2i2gecjtat7dkdpb6ua6o4/numikepefuma.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+teach+a+child+impulse+control
    • 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_off0000f8f5.bin
461939c86c389f8315431733039d447690249a01a1db00a039d343da2dbfd4b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 16732 bytes
font_01_sfnt_off00012495.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 16792 bytes
font_02_sfnt_off00013cac.bin
48f4b24de6a7f27438e0152abed2100f49b1606074671610ee330a59791a72da
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAC 10956 bytes