Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa2b5c204662f8a…

MALICIOUS

PDF

86.1 KB Created: 2021-07-14 05:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a40817fa4ccaeed6aaea4278b969849 SHA-1: 8ae44d4c9f40f5db28f19afdb8ee2b1f61c76948 SHA-256: 9aa2b5c204662f8a0d53d672813caa4268a63b2cfda9c6c33482c888b3cc574d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, 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, but the presence of numerous links suggests an attempt to direct users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8bdd27acc---zaxopuwutawapozijetu.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608d102dcd575---28977350051.pdf
    • http://studiosimonepantaleo.it/userfiles/files/muviw.pdf
    • http://turinhotelcompany.com/userfiles/files/fapesowuvekuremowonaga.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c5c729c51---tobiwenotamebukavokoludan.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/eg9rek53e8g81peeme87vppb4q/44281408292.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/fd6288bc2eea35b1fd7c87126b5e3d28/58569824933.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ac3tlj5a61knub9qv55cmrkagj/39342426461.pdf
    • https://parkettworld.com/upload/files/sifefugever.pdf
    • http://okmarin.ru/userfiles/file/52590527186.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608182adbdc06---momegotedumonizavexe.pdf
    • https://aterhesseg.com/up_image/file/4183666546.pdf
    • http://herve-coiffure.ci/files/kizijuxu.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/lusuxiga.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/67d4af6c8cdb2d0a1718739df525b2ad/74754760595.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609dee1c572bb---jidolilera.pdf
    • http://simonide.org/userfiles/file/logizexopawotemaxomi.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/b734e74803d1f6195b4e814702fec775/femokibo.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6db44fad---vozatamixokelajejupuk.pdf
    • https://alihuata.com/userfiles/file/tigik.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/f05335b6487c65401d17c3f72a4cd7be/kijixujubob.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8bbc2d1b---gexiloxovekap.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609458ed84255---34163041662.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=fun+math+trivia+questions+and+answers+for+adults
    • 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_off0000ec19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 16792 bytes
font_01_sfnt_off00010430.bin
3bf61757f2689bc964f091e4d9e8d897cf06299323fadde3dfa74f0bbea57537
pdf-font-stream PDF embedded font (sfnt) at offset 0x10430 10996 bytes
font_02_sfnt_off00011d57.bin
32b05e875264b21a58bf3a76e563c641a02a242285c5fe08b276fdc7d64929dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 17396 bytes