Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed013ac1aba49461…

MALICIOUS

PDF

128.3 KB Created: 2021-05-24 01:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 320c53e0a85d8cc2721edb89a0b00a1d SHA-1: e1823439ddff5e8b2fb95b1cf921d34445ad8caa SHA-256: ed013ac1aba494618c539f9c23550d7fd5a0de212c70b09f5f3223d5326c510c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, and detected by ClamAV as a phishing trojan. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. One of the embedded URLs is https://jottigo.ru/strik?utm_term=will+azalea+cuttings+root+in+water, which likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=will+azalea+cuttings+root+in+water PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478932/normal_606d9c758b157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_6029b094aeac9.pdfIn PDF document text
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/sewiguluz_liwavutuvagif_rajoxi_murufitawazule.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/xuful_wagozo_judokazetu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ffba0fa1bcaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_601031ac4f1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_601bfbf85e73c.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/16cd25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_601e381dec0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_604cfa3cd2882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_5fd7c0285bbb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_605b1f1d403b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506200/normal_5fd1040714aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_606478245f7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_6016931c0b8af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5ff8563e83091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5ff144b72b77f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_60581ce4c3eaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5fedd898655b3.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/ed455a64-83c5-4262-8056-d253cead36a4/como_se_hace_un_titulo_salvage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c331bff-ba99-403a-96c1-a9638532d34a/26522544070.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_off0001b96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B96A 5124 bytes
SHA-256: 999a97f594d3247862bc1728edf4c710a1c2b3283a34074844982748414363c4
font_01_sfnt_off0001cb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB05 12268 bytes
SHA-256: e558ed47cec7b230002468aa676b7cd715eb4b445958313d4df02bb386dce126

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