Malicious PDF — malware analysis report

Static analysis result for SHA-256 078018840f0ab0fa…

MALICIOUS

PDF

141.1 KB Created: 2021-06-28 00:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 95808702bb58d898d51790615f585f6c SHA-1: f03826b7bc6403c06b7125ec603e4248f1f61d81 SHA-256: 078018840f0ab0fa06d7c361b9336120cb6196a91c9dc5d18d23a26a58789b2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the embedded URLs and link farm structure are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d76gj4kio8jkl1tpm1hfpe55f3/28029632892.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16081a522c18d0---87350316372.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607596d06d444---98482667142.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e37ec2777a72d7dcd14942d3b8b1180d/ponomijira.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/aih3ugkotjfvn3jpvlgc8gin43/50947897386.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/72439301799.pdfIn PDF document text
    • https://papiratisk.cz/soubory/dagetogor.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/lujisutujiserisugaju.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rveuakveobgjm65i41d0q8gpe6/nozumagike.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/fevuwodifodujixu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4ef88379e78cda0dbaf7d4bc8a13216c/23158553268.pdfIn PDF document text
    • http://arslanemlak.come/file/78151234033.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/3302517a1d4167a4bfd362494c5cba25/gapipume.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608deabbcfbd4---gamasivomifagem.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/n2j0glg5b5jlov17a212q6g2uv/10106382376.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/gimug.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607048234c5c8---zosezevavulewobefemo.pdfIn PDF document text
    • http://fitviewer.de/files/file/78927949899.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/suposizew.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/doganixogunalopo.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/46ee5e767322e7e470368edf96d8a2ba/tuwevomaxeg.pdfIn PDF document text
    • http://foodchemsino.com/d/files/wiwupavewikizizadave.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83cdecef8---35001312230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=giancoli+physics+solutionsPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C32A 19528 bytes
SHA-256: fd9297aee7a6d512419d263bed8d38e18978584b28cc7240a74deaa3d4e8143c
font_01_sfnt_off0001f738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F738 10492 bytes
SHA-256: 72950081bd0427b28b4fe9f8e99b535798bb12ad18ae1d07d1d3da5e4c39d742
font_02_sfnt_off00020f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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