Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d844a06e3fab7c…

MALICIOUS

PDF

96.7 KB Created: 2021-06-26 10:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01b064bdce7252262ed3567a74ffe080 SHA-1: 4c50a176c72bcddb920026bf63430f224f069de5 SHA-256: e3d844a06e3fab7cbe710970ed1899588e02f427ee8e4b3c954636d6c52dfcaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing campaigns that often leverage embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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 http://albatrossmrn.com/konadnew/userfiles/file/nofefitajuxo.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/te5ms88q75814npk9dlq2a48vt/venawadidoxexu.pdf
    • http://foodchemsino.com/d/files/buris.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/63029206597.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160727a8e58580---zefote.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdee518abce---pezumuzo.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/1f8601e8ea823cea4d4b085fbca5343c/46712502248.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086499d07bc6---ragubamufojukeni.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95a5ce032---wibixitavoxigar.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/99ebb2e9dcb3c010c79bdde91965b250/57918729709.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/68de53f45a68933379d6932bf9e448ac/repawinimuwuzatekari.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d357d52b9a---xofopedune.pdf
    • http://aquatherm-graz.at/files/24123444253.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2524819bc---63438342841.pdf
    • http://momsystem.ru/public/file/30469936810.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c16bf55094b0fd8bb27148a4e385b9b1/91295146645.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/f0660f26062b42f2db4910a42791d1db/mivaraxorunerabinofiraves.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f2caa6a8b---merimotorikokiruwofeni.pdf
    • http://cansuyu.org/resimler/files/bidenubofafir.pdf
    • http://arslanemlak.come/file/fesakiroxuzaguga.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/8a58a9189284e8151622307820262361/33451882331.pdf
    • http://braciszewska-klimek.pl/fck_files/file/4754417766.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/50958015444.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/fe3cc08a5ce528aeabeeb6b3d8534c33/1725750604.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607f01ba7ce61---15826868345.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=king+jotham+in+the+bible
    • 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_off0000fe56.bin
20fdc496cf50012082e99f3e1c1ad83c2354b2f88ca8e96e0fd1b66c4295ed3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 16380 bytes
font_01_sfnt_off000114d6.bin
d4467e10eb5fa8aabf0ea682d8223a8f657bc2f8dd5d39fe22fa8345844a191b
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D6 18360 bytes
font_02_sfnt_off000144f6.bin
6a8fb0811dd5277de508426994207faa06bb1cb82730997c6ac8c4b4a73c036d
pdf-font-stream PDF embedded font (sfnt) at offset 0x144F6 10548 bytes
font_03_sfnt_off00015cb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB8 16792 bytes