Malicious PDF — malware analysis report

Static analysis result for SHA-256 00033fec33949b69…

MALICIOUS

PDF

110.1 KB Created: 2021-09-03 05:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47ffb205c9cebc1978506fa872fa33e7 SHA-1: 94a6d39cb8b75cbda192f49b45043ee0efac59b2 SHA-256: 00033fec33949b69151ae2b9eff6dd17d1159b144248554dad297badc87a3876
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or further compromise. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f09999462---xopimibixojadesu.pdf
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/60963468787.pdf
    • http://ordineveterinarivenezia.eu/userfiles/files/74305698786.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/3603026147.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b13380ddbde---todagobigiburuxib.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/l4tt0db6ja1vi6kcsst1sandtt/doxisilurofixixuloninigo.pdf
    • http://yaeram.com/userData/board/file/dijitewexanog.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/rfdghrd8kmhu7n1tkl105nufk6/50416520997.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/g5i24oadl29bce0srhe8q2ng3q/18545383436.pdf
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/tokil.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b450294751---15324245535.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bd5c5318d---bazizagusidaxuw.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ae24i0nl992j13pl79gi2bl46k/78240848184.pdf
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13344748223.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/34ab163733f975dffbbdb08b9dd80d44/33428427402.pdf
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/55708753001.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/81356171124.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fffd86034---turelepofaxenesabevamutaz.pdf
    • http://montaze.org/democms/userfiles/file/86474544476.pdf
    • http://botosani.ro/img/uploads/file/16401730529.pdf
    • http://derkwoo.com/upload/editor/files/98192058243.pdf
    • https://mandarinkinesiska.com/userfiles/file/88135943618.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2eb2d8967---16516572173.pdf
    • http://zulaikhatextile.com/userfiles/files/fububid.pdf
    • https://designclarf.it/file/watarobujixanir.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=singer+sewing+machine+8280+user+manual
    • 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_off00014509.bin
77fc6a77ede006865d3e8cdf574aa1bff0860a379d20f4c207c26c93af87390a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14509 11168 bytes
font_01_sfnt_off00015f02.bin
74fa25faed5854df86f8eb11630cffcd2c135cbacb74c32796ca629735781c89
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F02 19452 bytes
font_02_sfnt_off000191a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x191A9 16792 bytes