Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d9593f66925db1…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 07:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 62734f86c47198bb091dc59040897a99 SHA-1: 1454e56fd561ccee4c17b82878f54744583b2c45 SHA-256: 34d9593f66925db1f2b31846d9a0aab9888c7dd262196a838eb15a5cc4f1a3bf
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as a phishing trojan and exhibits multiple heuristics indicating malicious intent, including embedded JavaScript and a large number of external links. Many of these links point to compromised WordPress upload directories or other potentially disposable hosting, suggesting a campaign to distribute malware or conduct phishing. The embedded JavaScript likely facilitates the malicious payload delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hippocratio.gr/ckfinder/userfiles/files/minujawikerekonajet.pdf In PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fa28d1d3840---mipofituvi.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/5754289776.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/efaca6c255e1d92543a474dedc5d85fb/rojokavegewis.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/xusovewozozuminenifatam.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/gunomujoxuna.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f89a48e633a8b9464936cb8453543df3/24779632124.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210902115849_c2lkdXZhdmVn.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/55021189523.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/0e7087e70060c23ff6891464bd26ed9a/67425586772.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/emh95rjr6po0i3meaa1qtvhi2k/lulusijafovenato.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16102c43d7cf59---70799473300.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/68773692374.pdfIn PDF document text
    • https://lasanisports.com/files/butukedemiz.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/xujezokuxakulek.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7575a13f51---1192806819.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/499c42dd988648c40c6690f7fbc3eedb/35186300805.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/75154824093.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/napokoxaburewukozixer.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aac3c42a40e---wuxexumenabaniwupovitaxu.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/2u3bmmcnof1ekqa3jlj94iu3q2/jizip.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/9140d963c961be5636965cdfc8eddf1c/19658105217.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/38481792489.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/11517734293.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868ceaab7b8---bibivorunedukedotax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ma8402+probability+and+queueing+theory+pdfPDF 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_off0000e18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 18336 bytes
SHA-256: 4607db76fc1def70426380137da9019007564290fd891b648e2787ef9ccbea0f
font_01_sfnt_off000110e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FB 11632 bytes
SHA-256: 4728e62a7232a84b293ec9f46a6b3aa1e558fc2f2e42a55acdf843767b5dbec3

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