Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b93dfec9ac2908…

MALICIOUS

PDF

73.7 KB Created: 2021-03-23 17:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1d20dc95a4742841e49a550dc1de6f61 SHA-1: d85e8616ed75c1d65dc4adab772c934bd3823684 SHA-256: 14b93dfec9ac29089df627ec89ae06248ff3e41c8045699862d893af9dad05c6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical PDF SEO link farm detection and ClamAV identifying it as a phishing trojan. The document contains numerous external links, with one prominent URL being https://maypoin.ru/wix?keyword=sony+mex-xb100bt+for+sale, suggesting a phishing or spamming campaign. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/wix?keyword=sony+mex-xb100bt+for+sale PDF link annotation
    • https://cdn.sqhk.co/kufagilan/oeujbgh/vegetarian_grocery_list_for_weight_loss.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/votid.pdfIn PDF document text
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/jowekajafezadew.pdfIn PDF document text
    • https://lozuninusagutog.weebly.com/uploads/1/3/5/3/135309735/8307336.pdfIn PDF document text
    • https://rotalexabif.weebly.com/uploads/1/3/1/3/131381819/4640633.pdfIn PDF document text
    • https://bovaxomasomi.weebly.com/uploads/1/3/1/4/131437143/jewetiganepukozap.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/hjjrgdO/download_monkey_boxing_mod_apk_apkpure.pdfIn PDF document text
    • https://linizudozurori.weebly.com/uploads/1/3/4/6/134640128/domazapufipak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d824fa-9481-4cb0-ad8e-555892559daf/python_dictionary_update_value_for_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7380e09-8020-4b4e-8156-f7fa98a1f9e9/98259176641.pdfIn PDF document text
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_275b32793d3940adbbf6b218f229b235.pdf?index=trueIn PDF document text
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_d6fea9e753004c879734b804c83173d2.pdf?index=trueIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_85969ffdfaad4c04b1b7888faedf4739.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_da5e63c317f145538ba9513df18ce43d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23fcb69-a6b2-4d64-bfaf-53b95acd86fc/what_are_the_requirements_for_a_ham_radio_license.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 5552 bytes
SHA-256: 005db5a50aba1c5720fa52cd39cb6152482e918b71648bf2bedc7dde53f75d12
font_01_sfnt_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 11680 bytes
SHA-256: 6b83d66f47fc2dacc081283a853c6e35a2f99138c113d8c7cb6718710f062de1

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