Malicious PDF — malware analysis report

Static analysis result for SHA-256 47685af72e5d7fa0…

MALICIOUS

PDF

82.3 KB Created: 2021-03-29 04:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c7d266c03e634d99620ad75e7add820 SHA-1: df2d636e5d391319e0889e8a742db5761e0b5db6 SHA-256: 47685af72e5d7fa0182e7b40b751a412dafdf3f3e117c408bba9f13522759e41
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized, suggesting an attempt to create a link farm. One of the primary URLs, 'https://lozipotod.ru/award?keyword=methyl+salicylate+uses+pdf', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier also indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent, possibly related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=methyl+salicylate+uses+pdf
    • http://zijixiteluwek.scienceontheweb.net/can_cochlear_implants_stop_working.pdf
    • http://fibisazorowax.mypressonline.com/43134756885.pdf
    • http://moxawunanenubop.sportsontheweb.net/sotodubum.pdf
    • https://dugubutufafug.weebly.com/uploads/1/3/0/7/130775350/loxipakodajupasikok.pdf
    • https://pepigapipewoma.weebly.com/uploads/1/3/4/0/134000130/ae91843e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wudibirewuduto/dota_auto_chess_build_guide.pdf
    • https://s3.amazonaws.com/punurum/firefox_32_bit_win_xp.pdf
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_1f02f8f608da48c28f24c463df769e1d.pdf?index=true
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_8d52d848de7f49e4a752fe46b0eff1ba.pdf?index=true
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_0393cc827320434296ad6792b5eb905c.pdf?index=true
    • https://s3.amazonaws.com/bojafazes/advancing_vocabulary_skills_5th_edition_answer_key.pdf
    • https://s3.amazonaws.com/tibitexil/38364322074.pdf
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_13e9c30db1ea475189a6222a2da1bf4b.pdf?index=true
    • https://aaf8962b-2ea5-4403-bfea-7c32f2b3f77e.filesusr.com/ugd/8f3a65_de6cce492a0745709dea52f1573ee839.pdf?index=true
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_94287414d0b44180b616d253b052bdff.pdf?index=true
    • https://s3.amazonaws.com/lurutopobi/inventory_control_templates_excel_free.pdf
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_86f077ab4e9f4c2fad3d1c0754241c74.pdf?index=true
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_855a6a96a44c4cb187fd9f0ea2fbe17f.pdf?index=true
    • https://s3.amazonaws.com/lijopavexanuse/wepafofezozegij.pdf
    • https://s3.amazonaws.com/pexodugosa/67588190456.pdf
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_d2a7321978044f2cadf08c448eb2e721.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54b.bin
6bf18dc62216cc2a19c424dae6cf6631117521af7617923e8b5ae94445cfa202		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 4920 bytes
font_01_sfnt_off00010627.bin
632be447b8d8831be3b52e3b69921b868661b86d0d226bffbfba5df547f25779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10627 11900 bytes
font_02_sfnt_off00012dfa.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFA 4324 bytes

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