Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef331093d2abced…

MALICIOUS

PDF

97.7 KB Created: 2021-06-14 11:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ccba6d2b817bb479b172b0c40552d227 SHA-1: ef0ead4f32108baf9ef9ef203627486d275e0ec4 SHA-256: 2ef331093d2abcedebdf849cde9aa14c05dd1e38a280336159d5e0fe4e0e30f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=5+minute+guided+meditation+script+pdf PDF link annotation
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/aae0kj6v4hsstmhgasfn1klj0m/likekuw.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/54813252113.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7ba00d5a7---figufatetixuki.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/df8e6d2b0c3e9bc043a557cefd0a40be/52584289619.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/408dc14f31f9e56e1a06ab039c1ea79d/11398868626.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82d894eaf---49987142405.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aec3454e47---xelixefidifabotipadi.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/gefexesixofijiwazubufeliz.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703322e93cc---lutugoxikanemovuvebikini.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/10992237401.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b9a87c9ec1d03d9d3a5a2bd445e33b44/buzuvafawonaferezotabu.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/4npf0uu8hgcp1m9to085v0lmk3/18659449417.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/1913425e236ff0e15372143fa9b27777/dulukik.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/gudasilusewo.pdfIn PDF document text
    • http://sns.hu/_user/file/rowuzun.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91e1b4985---dabobowulukofigew.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/84f406a8d843ab390b06009298cf6f35/98436146773.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gc69392ibua1jb3183gi1a2ie6/13449118301.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/15744107326098417460c3d.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0442b336---pateritipaxagubokufivopin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13387 5356 bytes
SHA-256: 50063cbe6891ac5c94d2c1ec0c0c8f8ff4f07c432688ad952cea37a1fc1215cf
font_01_sfnt_off00014597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14597 11104 bytes
SHA-256: 3a99565775fb92ca7dc20ece07d1ec1ad060318a6b6793a41ebc7376b1ca20b1
font_02_sfnt_off00016b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B33 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.